硅酮隆胸植入物a silicone breast implant一种叫作吡啶酮的新型抗艾滋病药物能促使艾滋病毒变异，使其不能繁殖，也不会再感染新的细胞。A newer anti-HIV drug called pyridinone caused HIV to mutate into a form which could not reproduce or infect new cells.所有的主要难点都涌现在烯酮 ( 1 ) 的合成中....
People want to dissect his work and question his motives.人们想仔细分析他的作品，并对他的动机提出质疑。He had many motives for wanting to knock off Yvonne.他有很多杀伊冯娜的动机。The Secretary's letter questions my veracity and impugns my motives.部长的...
A pan rattled and clanked.平底锅叮叮咣咣地响。The prisoner's ankle chains clanked as they walked.犯人走路时脚镣叮当作响."Here we are now," Beth said, as the train clanked into a tiny station.火车咣当咣当进了小站，“我们到站了，”贝丝说。...
It grasps its victim in its forelegs and pierce it with its rostrum.它用前腿抓住牺牲品,把喙刺入对方身体.He grasps my hand in his, and I stop speaking.他猛的却握住我的手, 我也无力再说下去.It'seems that she grasps the concept of the text the fastest.看...