单词：time - of - flight mass spectrometer
单词：time - of - flight mass spectrometer 相关文章
We call this a co-viewing clique, a virtual living room if you will. 我们称之为共视团体，你可以把它当成一个虚拟的客厅 And there are fascinating dynamics at play. It's not one way. 这里头上演着引人注目的戏剧。它不
TED演讲教育篇
It doesn't matter to be a mass of bruises, and this time I care nothing about. But once is enough, because life can never afford such a heavy love. 这一次，遍体鳞伤也没关系；这一次，可以什么都不在乎。但只是这一次就够了
Daily English-2017.02
11.The Future of The English J . B. Priestley 1 To write about the English in standard and cosmopolitan political terms, the usual Left-Centre-Right stuff, is almost always wasting time and trouble. The English are different. The English are even mor
高级英语 下
Broadcast: Jan 22, 2003 By Marilyn Christiano VOICE ONE: This is Steve Ember. VOICE TWO: And this is Sarah Long with the VOA Special English program, Explorations. Today we tell about a scientist who
VOA2003（上）-科技导航
For nearly 130 years, the worlds scientists have used a singular small, metal cylinder to define the exact weight of a kilogram. But that is about to change. The cylinder was made in 1889 of platinum and iridium metals. It is called the Grand K. The
2018年VOA慢速英语(十一)月
This is Scientific American's 60-Second Science. I'm John Matson. Got a minute? In a laboratory vault outside Paris is a small cylinder of platinumiridium alloy that serves as the standard for all mass measurements worldwide. By an 1889 international
Scientific American(一)月
When the Pachyrhinosaurus bodies came to the bend in the river the momentum of the water push their carcasses to the outer edge of the bend. 当肿鼻角龙的尸体来到河流的转弯处，水流的动力将它们的尸体冲向河流转弯处外缘
侏罗纪搏击俱乐部
Stay Thin By Sleeping More A study published Monday found that people who sleep less tend to be fat, and experts said it's time find if more sleep will fight obesity. We've put so much emphasis on diet and exercise that we've failed to recognize the
早读英语精华本
Several listeners have written with questions on when to use the definite article the, the indefinite article a, or neither. For example, Tracy W. wrote, Which is correct: Thank you for taking time to review my application, or Thank you for taking th
英语语法 Grammar Girl
Residents tended to stay thinner when a commuter train was added to their region, because of increased exercise walking to and from stops City planners and citizens alike frequently push for better public transportation. They argue that it can lessen
60秒科学
Two: Strength Training 减肥之二：力量训练 Strength training or resistance exercises use your existing muscular strength to improve muscle mass and burn fat. The result is more lean muscle mas
奥运英语
City planners and citizens alike frequently push for better public transportation. They argue that it can lessen traffic and reduce emissions from cars. Now theres a new reason to be gung-ho about public transitit helps make people skinnier. Thats ac
Scientific American(七)月
Pharsalia Plantation Celebrates 200 with Old Time Music 法萨利亚种植园庆祝200周年 Thats old time American music to celebrate an anniversary -- for a house. Pharsalia Plantation is on a beautiful mountain country road in Virginia. You can u
2014年VOA慢速英语(七)月
AS IT IS 2015-03-04 What Can Help Jakarta's Huge Traffic Problem? 什么能够帮助雅加达庞大的交通问题? The Indonesian capital Jakarta has long been held up as an example of a major city that cannot stop nor support its continuing growth.
2015年VOA慢速英语(三)月
Each tag is whipping around the center of the galaxy, the particular, the most striking thing you will notice is the motion of SO2.So SO2 goes on an incredible roller-coaster ride. It comes whipping around and then back out. Something with tremendous
自然百科2011年
Stay Thin by Sleeping More 想苗条多睡觉 A recent study found that people who sleep less tend to be fat，and experts said it's time to find out if more sleep will fight obesity. 最新的一项研究表明睡眠不足的人易发胖。专家们表
英语小达人
EXPLORATIONS – Albert Einstein By Marilyn Christiano Broadcast: Wednesday, February 23, 2005 VOICE ONE: This is Steve Ember. VOICE TWO: And this is Sarah Long with the VOA Special English program, E
Explorations
Americans were exposed to the terror of mass gun violence again on Wednesday, this time at a social services center in San Bernardino, California. The initial reports revealed a distressingly familiar pattern: A heavily armed active shooter or shoote
阅读空间
We expect companies selling products to make them as available as possible. But now some of them are bringing back rationing. As you might expect, it's all part of a plan to make us spend more, not less. Once upon a time, goods were scarce, and hard
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