Butyraldehyde 1,2 proparediol acetal was synthesized by using stannous chloride as catalyst.以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using stannous chloride as catalyst.以非质子...
分为四个不同的类群: 苏铁类 、 银杏类 、 松柏类、买麻藤类植物以及一些化石类群.There are four widely different living groups: the cycads , ginkgo, conifers , gnetophytes, and several fossil groups....
Nelson Piquet, three times world champion, was grievously injured.三度获得世界冠军的尼尔森·皮奎特受了重伤。Birds, sea-life and the coastline all suffered grievously.鸟类、海洋生物及沿海生物均受到严重影响。The Irish and Bristol Channels were closed or grievousl...
他跌倒时,前颚撞在了道路的边石上.He hit his forehead against kerb when he fell.而且他的面孔光润, 颚骨下陷.And then his face was smooth , with a receding jaw.牙痛使我整个颚都痛起来了.A too thacke racked my jaw....
人群虔敬地噤了声。A reverent hush descended on the multitude.他日夜祈求上帝赋予他虔敬的心.He prayed to God night and day to endue him with the spirit of holiness.彼后1:7有了 虔敬 、要加上爱弟兄的心.了爱弟兄的心、要加上爱众人的心.And to godliness brotherly kindness; and to ...
你可以看到他们脸上的彩虹色。You can see the iridescence on their faces.黑色素翅膀和彩虹色翅膀的代价与上面却完全不同.The costs of melanin - based plumage and iridescence are clearly different from this.因为在我的电脑显出是彩虹色的, 很多彩的色泽.Because in my computer the line ...