I don't know how often I heard the same awful jokes.这种千篇一律的烂笑话我不知道听过多少回了。No matter how often they turn up, their welcome never wears out.不管他们多久露面一次，都永远那么受欢迎。How often do you give your phone number out?你经常把自己的电话告诉别人吗...
Attention should be paid to the gistory of unclean coitus or uterine cavity operation.因此,在诊断感染性疾病时应注意近期不洁同房史或宫腔手术史.They may attempt coitus with calves, ponies, sheep, pigs, dogs, and even ducks or chickens.他们可能尝试与小母牛 、 小...
Water soluble hydroxypropyl � � cyclodextrin was converted to acetonyl hydroxypropyl � � cyclodextrin via selective oxidation.通过选择性氧化,将水溶性优良的羟丙基β环糊精转化为丙酮基羟丙基β环糊精....
From then on, they were taking no chances.从那时起，他们就不再冒险了。From then on we raised our heads and became our own masters.从此我们抬起头来当家做主了.We become companion in misfortune from then on.从那时起,我们就成了患难之交....