空气中所含的氮的比例是多少?What is the percentage of nitrogen in air?作物收获后, 他测定了作物中氮的含量.After harvesting the crops , he tested them for nitrogen content.不含碱性氮的化合物包括吡咯 、 吲哚 、 咔唑和苯咔唑.Non - basic nitrogen - containing series include pyr...
from generation to generation的音标：from generation to generation的英式发音音标为：[frɔm ˌdʒenə'reiʃən tu: ˌdʒenə'reiʃən]from generation to generation的美式发音音标为：[frʌm ˌdʒɛnə'reʃən tu ˌdʒɛnə'reʃən]...
They will dance two performances of Ashton's "Romeo and Juliet".他们将表演阿什顿的《罗密欧与朱丽叶》中的两场舞。A timely bingo win brought some cheer to Juliet Little's family yesterday.昨天玩宾戈赢了一把，适时地给朱丽叶·利特尔一家带来些许的欢快心情。She was plucked...
It has toyed with the idea of repealing the law and starting again.它又开始玩弄废法重立的把戏.He picked up a pencil and toyed with it idly.他捡起一支铅笔，无所事事地摆弄着。He toyed with the idea of going to China.他动过去中国的念头，但并没当真。While he was talking...
Cosmic rays and X - rays produce energetic electrons by ionization.宇宙射线和 X 射线因其电离作用产生高能电子.Do you believe in a cosmic plan?你相信冥冥中的安排吗？They also contain a lot of cosmic crud, mostly in the form of dust-sized grains.它们也含有一些...