帕尔默先生是一名退休的数学教师。Mr Palmer was a retired maths master.他现在已经完全打消了退休的念头。He has now banished all thoughts of retirement.莫里斯现在已经打消了退休的所有念头。Morris has now banished all thoughts of retirement....
Results In normal fetus, the urorectal septum ( URS ) descended, its distance to cloacal membrane decreased gradually.结果 泄殖腔发育过程中,胎龄15d前 的正常鼠胚, 尿直肠隔将 泄殖腔 分为腹侧的尿生殖窦和背侧的直肠两部分, 二者共同相通于泄殖腔管....
She read everything, digesting every fragment of news.她什么都看，对新闻的每个片段都细细品味。But that fragment of talk lodged , thick, in his small gizzard.可是谈话的片断却深深盘据在他的小头脑里面.A free radical is a molecular fragment having an unpaired elec...