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. Results In normal fetus, the urorectal septum ( URS ) descended, its distance to cloacal membrane decreased gradually.
It's exhilarating to climb mountains.登山令人振奋.We plan to climb mountains, go fishing, swimming and surfing.我们打算去爬山 、 钓鱼 、 游泳还要去冲浪.I like to go on picnics and climb mountains.我喜欢去野餐和爬山....
Many operations, however, masquerade as Undo - proof , but they are really easily reversible.然而很多操作伪装成 防 撤销的, 但其实很容易恢复.Since optical paths are reversible, the opposite arrangement is also true.因为光路是可逆的, 所以也可以反过来安装.The pr...
尽管他们处处显得很高雅的样子，我还是不相信他们。I wouldn't trust them in spite of all their la-di-da manners.他下面的森林里处处生机勃勃。The forest below him seethed and teemed with life.从那以后，生活便成了处处与校规作对。After that, life became a matter of defying scho...
一群大象缓慢而笨拙地穿过平原，朝水潭走去。A herd of elephants lolloped across the plains towards a watering hole.他笨拙地想用一只手点燃香烟。He fumbled his one-handed attempt to light his cigarette.保罗笨拙地游到池子边。Paul swam in his ungainly way to the side of t...