核衰变

nuclear decay的用法和样例：

例句

A stream of particles or electromagnetic waves emitted by the atoms and molecules of a radioactive substance as a result of nuclear decay.核衰变产生的微粒或电磁波放射物的原子或分子由于核衰变放出的一束微粒或电磁波

英语诗歌:To Daffodils

Robert Herrick (1591-1674) Fair Daffodils, we weep to see You haste away so soon: As yet the early-rising Sun Has not attained his Noon. Stay, stay, Until the hasting day Has run But to the Even-song; And, having prayed together, we Will go with you

发表于:2019-01-02 / 阅读(63) / 评论(0)

英语诗歌

北师大版高中英语模块7--Unit 21 Lesson1-3

[00:01.17]It has also been proven that chewing gum [00:03.50]for long periods of time means [00:05.48]that the body does not have time to rest. [00:07.72]If this is the case, [00:08.95]the stomach may become tense. [00:10.85]Eventually this could lea

发表于:2019-01-10 / 阅读(217) / 评论(0)

北师大版高中英语模块7(选修)

北师大版高中英语模块7--Unit 21 Lesson1-1

[00:02.81]Unit 21 Human Biology Lesson 1 Chewing Gum [00:09.19]TO CHEW OR NOT TO CHEW... [00:12.21]Diet specialists regularly inform us [00:14.82]that it is important to chew our food properly. [00:17.74]They suggest that if we chew our food [00:19.7

发表于:2019-01-10 / 阅读(233) / 评论(0)

北师大版高中英语模块7(选修)

used to 的用法

used to v used （否定式简写为usedn't）过去经常，以前常常 Weusedtogothereeveryyear. 我每年都去那儿。 Heisnotwhatheusedtobe. 他已不是旧日的他了。 Itusedtobebelievedtha

发表于:2019-01-30 / 阅读(58) / 评论(0)

英文语法词汇

Plastic pollution

Plastic Pollution NB: This is not an accurate word-for-word transcript Dan: Hello and welcome 6 Minute English from the BBC. Im Dan Walker Smith and today Im joined by Kate. Kate: Hello Dan. Dan: Now today Kate and I are talking about pollution. Kate

发表于:2019-02-04 / 阅读(52) / 评论(0)

六分钟英语

精彩托福句子 2

11.Acids are chemical compounds that,in water solution,have a sharp taste， a corrosive action on metals,and the ability to turn certain blue vegetable dyes red. 12.Billie Holiday's reputation as a great jazz-blues singer rests on her ability to giv

发表于:2019-02-13 / 阅读(40) / 评论(0)

托福英语

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Aconitum cannabifolium