最早的动物胚胎化石,约于五亿七千万至六亿年前形成,发现于中国东面的陡山沱.Fossilized animal embryos of 570 - 600 million years ago from Doushantuo formation of East China.长江发源于世界屋脊 -- 青藏高原的各拉丹冬雪山西南侧,正源沱沱河,南源当曲河,北源楚玛尔河.It originates from the Tuotuo River on ...
He described the difficulties of surviving for four months as a captive.他描述了被俘4个月里挣扎求生的艰难岁月。Viruses tend to be good at surviving when a computer system crashes.计算机病毒在系统崩溃后往往依然存在。The odds against him surviving are incredi...
我们是先头部队, 大军随后就到.We are the advance detachment. The main forces will be here soon.我们派出一支先头部队.We sent out an advance party of soldiers.美军是这次进攻的先头部队.American troops formed the spearhead of the attack....
我们向无耕地者分发同等面积的土地。We are giving an equal area of land to the landless.据我们所知, 海洋占地球面积的70%以上.As we've seen, oceans cover more than 70％ of the earth.森林资源清查中,多阶抽样并不局限于固定面积的抽样单元.Multistage sampling in forest inventory is ...