The causes of tarnishing gold and silver - plated connectors were studied respectively.分别探讨了接插件镀金和镀银层变色的原因.Bright tin electrodeposits on copper wire are susceptible to tarnishing.铜线材经光亮镀锡后易产生腐蚀变色.Do they not realize thei...
At places in the thickest layer they are present as ellipsoidal globules, 1 - 10 mm in length.在最厚岩层中,有的地方它们呈椭圆形球体, 长1 ― 10毫米.Fruits ellipsoidal, 1.2 - 1.8 cm long, tomentose, main ridge with corky wing.果椭圆状球形, 长1.2-1.8厘米...
由此你可以算出银河系的总质量。From this you can calculate the total mass in the Galaxy.银河系由1,000亿颗恒星组成。The Galaxy consists of 100 billion stars.地球是银河系中的星球之一.The earth is one of the planets in the Galaxy....
在四倍体 、 具假配子的种光悬钩子中选了二个植株.In the tetraploid, pseudogamous species Rubus nitidioides, Haskall selected two plants . Haskall.生殖细胞:是生物体所有细胞中最终能产生配子的细胞.Germ cell Any cell in a cell lineage that eventually produces gametes.�...
关于他缺席的原因有很多传言。There has been much gossip about the possible reasons for his absence.艾丽斯从不缺席的记录真是值得称赞的.Alice's record of perfect attendance is very creditable to her.她缺席的借口显然是瞎编的.The excuse for her absence was obviou...