n.<古><诗>二;一对;(二者)水火不相容;永远不可能合到一起;
例句:
The twain , lighting a latern, went out to the stable.
姐俩于是点起灯笼, 上了马棚.
Twain himself seems to have inherited something of this attitude.
吐温似乎继承了这种秉性.
At the centre of book's success is Twain's appreciation of children.
本书获得成功的关键在于吐温能够理解儿童.