连作

continuous cropping的用法和样例:

例句

  1. The allelopathic effect of continuous cropping soil of Panax notoginseng was investigated and its mechanism was revealed initially.摘要探讨三七连作土壤的化感作用,初步揭示三七连作土壤化感作用的机制。
  2. Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.摘要利用平板培养法对黄瓜连作根系微生物种群连续性变化进行了跟踪研究。

[00:00:01] I am in hot water now, all the things seem to be blown up. 我现在遇到麻烦了,好像所有的事情多和我作对似的。 [00:09:03] Do not be scared. 别泄气, [00:10:25] Bite the bullet and everything will be right again. 咬紧

发表于:2018-12-03 / 阅读(213) / 评论(0) 分类 迷你对话学地道口语

[00:00.00][s],[ ][ ] [00:38.61]sea/sheet/chicken [00:42.66]Exercise One: Word Conparison [00:47.62]Listen to the following words from your tape and repeat. [00:52.98]sip ship sane shane watched washed [01:01.23]lass lash least leashed chin [01:09.09]

发表于:2018-12-03 / 阅读(333) / 评论(0) 分类 掌握英语发音

现在完成进行时(The Present Perfect Continuous Tense)表示由过去某时持续到现在的动作,由have(has)been+现在分词构成: It has been raining for three hours. 一连下了三个钟头的雨。 She has been working the whole mo

发表于:2018-12-18 / 阅读(196) / 评论(0) 分类 英文语法词汇

过去完成进行时(The Past Perfect Continuous Tense):表示过去某时前一直在进行的动作,由had been+现在分词构成: I asked him what he had been doing. 我问他一盲在干什么。 He had been working all day and was very

发表于:2018-12-18 / 阅读(195) / 评论(0) 分类 英文语法词汇

Scientists and doctors cant make their minds up about coffee. One study says its really bad for us and the next report says its good for us. Ive even read that 10 cups a day is good for our brain. I like a cup of coffee at certain times of the day. I

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[00:10.06]Gehrig continued to improve as a player. [00:14.05]By 1924, pitchers for opposing teams were having bad dreams about Lou Gchrig and Babe Ruth. [00:23.04]Ruth hit sixty home runs that year. [00:26.36]Gchrig hit forty seven and won the Americ

发表于:2018-12-26 / 阅读(224) / 评论(0) 分类 美国英语听力80篇

Scientists and doctors cant make their minds up about coffee. One study says its really bad for us and the next report says its good for us. Ive even read that 10 cups a day is good for our brain. I like a cup of coffee at certain times of the day. I

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just在英语中是一个重要的词语,其使用方法也是多种多样的。Just可以用作一个时间表达,用来在一些固定表达中表示某事十分重要,对词语进行强调,并作为only的同义词。本指南可以帮助你

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Yvonne: This is 6 Minute English, I'm Yvonne Archer and Alice has kindly joined me for today's programme. Hello Alice. Alice: Hi Yvonne. Yvonne: Now Alice, how do you get around London? Alice: Ooh by bus, bicycle and usually the Tube. Yvonne: Aha, an

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[ti:UNIT 3 Amazing Animals Lesson 17: People Love Pets!] [0:00.501]UNIT 3 第三单元 [0:01.876]Lessons 17~24 第17~24课 [0:04.543]Amazing Animals 令人惊异的动物 [0:06.544]You Will Learn 你将学到 [0:07.794]Functions 实际应用 [0:08.

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This is the VOA Special English Agriculture Report. Strip cropping Nigeria is the world's largest cowpea producer. Cowpeas are also called black-eyed peas. But there is always room for improvement. Recently, before the start of another farming seaso

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First Mr. Yee did a trick with scarves. 首先易先生用围巾变了一个戏法。 I told you, said Fox. 我说过吧,小狐说。 Then Mr. Yee made his helper vanish. 接着易先生将他的助手变没了。 Ho-hum, said Fox. 哼,小狐说。

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> 28 世界卫生组织关于噪音污染的报道 DATE=3-29-01 TITLE=SCIENCE REPORT - WHO Report on Noise BYLINE=Caty Weaver Start at 59

发表于:2019-01-30 / 阅读(191) / 评论(0) 分类 科技之光

Key Sentences(重点句子) 146.The connection was bad. 通话情况很糟。 147.There was a lot of echo and I couldn't hear well. 回音太多,我听不清楚。 148.I'll connect you agian. 我再为您接通一次。 149.I've just

发表于:2019-02-07 / 阅读(201) / 评论(0) 分类 实用英语

The chains of habit are generally too small to be felt until they are too strong to be broken. - Samuel Johnson Editors note: This is a guest post from Mary Jaksch of Goodlife Zen. Have you ever had problems establishing a new habit? Maybe I should a

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Have you ever thought why there are very few great people? I think there is probably only one great person out of 10,000 at best, and most probably much less than that. But why? Most people want to be great, right? Why are there only very few of them

发表于:2019-02-17 / 阅读(268) / 评论(0) 分类 英语美文

Have you ever thought why there are very few great people? I think there is probably only one great person out of 10,000 at best, and most probably much less than that. But why? Most people want to be great, right? Why are there only very few of them

发表于:2019-02-18 / 阅读(199) / 评论(0) 分类 英语美文

下面给大家提供一篇关于生活中噪音的影响的托福阅读背景材料,希望能拓宽同学们的阅读面。 I'm grad to see so many of you here. We'vebecome really alarmed over the health center by thenumber of students we are seei

发表于:2019-03-02 / 阅读(288) / 评论(0) 分类 托福英语

Key Sentences(重点句子) 146.The connection was bad. 通话情况很糟。 147.There was a lot of echo and I couldn't hear well. 回音太多,我听不清楚。 148.I'll connect you agian. 我再为您接通一次。 149.I've just

发表于:2019-03-11 / 阅读(318) / 评论(0) 分类 实用英语
学英语单词
a yarn
adcomp
addended
ageda 21
alessi
alky gas
analogue function generator
automated weld
bimed program
braking propagation rate
butternut trees
cassini coodinates
Circuit discipline.
clinopodium chinense o. kuntze var. shibetchense koidz.
cornemuses
corpus luteum (or yellow body)
cosmic-ray telescope
cutesily
dailygraph
dendritic cancer
displacement of water
Drosera oblanceolata
dynamic file binding
energy-importing
ensoul
evi
ex abundante cautela
false documents
ferric alum
flocks and herds
fracture anisotropy
free-cutting brass
fuel and light indices
fugitive water
gate unit
hair graft
hand-operated fruit press
have not a brain in one's head
heat-supply load factor
Herxheimer
IFDH (in-service forced derated hour)
imbabahs
Indonesian
industrial detergent
inflatable appliance
interwar
irradiation effect
jesuit orders
lavatory paper
lift wire
lilioceris neptis
liquid flux cover
meatpuppet
mercury (mercuric) blende
mesosternum
metrazol shock therapy
milaner
Murca
nailfolds
Neuzen(Terneuzen)
off-line printer
open-circuits
osteophor
Panhoss
Paungma
pearly-white
plate making machine
pleuridium julaceum besch.
polyatomic acid
polypectomy
post-famine
potawatomis
prettyman
principal-axis of stress
proper noun
raised flooring
read compare check
remnant ocean
repair bill
sacrifice sale
scholarship
Shimotsuma
sociograms
sound exposure meter
sterias
store-and-forward system
straight ramp
straw pulping wastewater
suboceanic mantle
tape-oriented system
TFT (thin film technology)
thething
Tridentinae
Tungjong
tungsten bronze structure
turkeycock
vasomotor disturbance
ventricular systolic wave
voice-frequency carrier channel
west southwest (wsw)
working-stress
Yangzhong