Ketenes, notably dimethyl ketene, readily undergo oligomerization and polymerization.烯酮, 特别是二甲基烯酮, 很容易齐聚和聚合.The purity of dimethyl disulfide was determined by capillary gas chromatography.应用毛细管气相色谱法测定二甲基二硫的纯度.Marine livi...
掌控你的操纵绳缓慢的并保持前进.Handle your brakes smoothly and progressively.当单边大夹时(左边), 保持另一边(右边)操纵绳压力并将身体移向那边(右边)压重.When slope is on your left, keep pressure and body shift on the right....
I found the restrictions irksome.我对那些限制感到很烦。And then all ties were irksome, all earthly attachments unnecessary.于是,一切联系都是讨厌的, 所有尘世的依附都无必要了.It is irksome to listen to his constant complaints.听他无休无止地抱怨真使人心烦....