Officials from Greenwich Observatory have the clock checked twice a day.格林威治天文台的职员们每天对大钟检查两次.Guy's house was close to the observatory.盖伊的房子离天文台很近.China boasts the world's earliest observatory, built in Nanking ...
Officials from Greenwich Observatory have the clock checked twice a day.格林威治天文台的职员们每天对大钟检查两次.The Royal Greenwich Observatory was founded to observe and catalogue the stars.当初创立皇家格林尼治天文台就是为了观察星体并对其进行编目。Few museums could r...
F 1 females could be backcrossed to the male homozygous recessive parent.也可用雌性F1与隐性纯合雄性亲本回交.Altogether, half the offspring will be homozygous at that particular locus.加在一起, 将有半数的后代在那个特定的位点上是纯合的.Homozygous races do not se...
She was now shaking with long, racking sobs.她正剧烈地抽噎着，浑身颤抖。All night I have been tossing and turning racking my brains to think what could have possessed the young man to kill himself.整整一晚我辗转反侧,绞尽脑汁,想弄明白是什么原因竟能促成这个年轻人自杀.H...