Alec blotted his copybook — got sent home for bad behaviour.亚历克因为行为恶劣被遣回了家，一下子名声扫地。Yuri gave a copybook display.尤里的表演堪称完美。It was a copybook operation by the police.警方的这一行动非常出色。...
橙剂是一种强效落叶剂。Agent orange is a powerful defoliator.争论的核心针对有毒落叶剂的问题.The debate focused on the issue of poisonous leaf - falling agents.这次坠毁将一种有害的落叶剂洒入星球的生态系统中, 破坏着当地的植物群.The crash had spilled a noxious defoliant into the pl...
One percent of Brazil's total forest cover is being lost every year to deforestation.由于滥伐，巴西的森林总覆盖面积正在每年减少百分之一。Firewood scarity offers the most visible and dramatic example of deforestation's effects.薪材短缺是毁林后果的...
Several new plays will be performed on National Day.国庆日将上演几个新戏.The National - Day celebration this year was an unprecedentedly great occasion.今年国庆日庆祝仪式空前盛大.National Day is drawing near.离国庆日很近了....
Quantitative arteriography, before and after a year, and cardiac PET scans.定量动脉造影术, 一年前后, 还有心藏正子扫描.Objective To explore the nursing points in coronary arteriography via radial artery.目的探讨经桡动脉行冠状动脉造影术的护理经验.Acute myocardia...
The economy has entered a sharp downturn, and unemployment and insolvencies can be expected to increase.经济形势急转直下，失业与破产现象预计将会增多。Only rarely did businesses of Schefenacker's or Meridian's size have to endure long...
以苯胺和溴乙烷为原料,用四乙基氢氧化铵作相转移催化剂,在常压下合成N, N二乙基苯胺.N, N - diethylaniline was synthesized under normal tempreture with tetraethyl ammonium hydroxide as phase transfer catalyst.利用β-环糊精-1,2-二溴乙烷乙醇混合体系作增敏剂首次提出了用荧光光度法测量阿苯达唑含量的方法.A fl...