He was listless and pale and wouldn't eat much.他无精打采，脸色苍白，食欲不振。She looked washed out and listless.她看上去精疲力竭而且情绪低落。The illness left her feeling listless and depressed.那场病使她感到虚弱无力，提不起精神。...
这就像是一种化学试剂.It is like a chemical reagent.这种双用试剂把蛋白质分子彼此连接起来.This bifunctional reagent links protein molecules to one another.碳容易被亲核试剂进攻.The carbon should be susceptible to attack by a nucleophilic species....
If he is unlucky, he may find that his ex-partner denies him access to his children...如果不走运的话，他可能会发现前妻拒绝让他接近自己的孩子。He denies murder on the grounds of provocation...他否认激情杀人。He denies that racism is just skin-deep.他否认种族主义仅仅...