She began to menstruate regularly at 13 at intervals of 28～32 days with slight dysmenorrheal.她于13岁开始有正常的月经,周期为28～32天,有轻度的月经痛.She began to menstruate regularly at 13 at intervals of 28~32 days with slight dysmenorrheal.她于...
Too bad he used his intelligence for criminal purposes.他把聪明都用在了犯罪上，太可惜了。For all practical purposes the treaty has already ceased to exist.实际上协议已经不复存在。They emphasised that their equipment was for peaceful and not military...
white phosphorus白磷, 黄磷Phosphorus and its compounds are non renewable and non replaceable limited resources.磷是一种不可更新、难以替代的有限自然资源.Phosphorus is essential to plant growth.植物生长需要磷.red phosphorus红磷, 赤磷White or Yellow phosphor...
Firemen tried to quench the flames raging through the building.消防队员奋力扑救大楼中熊熊的火焰。He stopped to quench his thirst at a stream.他停了下来，在小溪边饮水止渴。Having a bottle of soft drink is not enough to quench my thirst.喝一瓶汽水不够解渴.The fir...
...interstellar space.星际空间Fluorescent destruction occurs about once for every ten interstellar ultraviolet photons absorbed.每吸收十个星际紫外光子,就会发生一次荧光破坏过程.Which kind of signal is most promising for interstellar contact?在星际通讯中,...