It is vexing to have to admit you are wrong.不得不承认自己错了是件很苦恼的事情.particularly vexing aspects of modern life.现代生活中一些让人烦恼的社会视点It's as vexing as the riddle of the Sphinx.这个问题和古埃及司芬克思的谜语一样令人费解.But on the vexing issue of ta...
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....
锋利的刀刃可能会划伤皮肤，导致出血。A sharp blade is likely to nick the skin and draw blood.用一把非常锋利的刀将褐色的皮从肉上剥去。Pare the brown skin from the meat with a very sharp knife.地上铺满了棱角锋利的石子。The ground was strewn with sharp-edged pebbles....