twain

n.

二；一对；（二者）水火不相容；永远不可能合到一起

adj.

二的，一对的；

mark twain n. 马克·吐温（美国小说家）

1. And whosoever shall compel thee to go a mile, go with him twain.
   有人强逼你走一里路,你就同他走二里。
2. The difference between the twain is perceptible.
   这对双胞胎间的区别是可以看出来的。
3. East is East, and West is West, and never the twain shall meet.
   东是东,西是西,故而两者永远不相遇。

Clutch of a twain engine remote control automobile
The twain meet: empirical explanations of sex differences in health and mortality.
Mark Twain Meets DSM-III-R: Conduct Disorder, Development, and the Concept of Harmful Dysfunction
ALLOMETRY AND JUMPING IN FROGS: HELPING THE TWAIN TO MEET.
Never the Twain shall meet? Closing the gap between coping research and clinical intervention research
Innovation and tourism policy in Australia and New Zealand: never the twain shall meet?
Theoretical and Empirical Studies of Producer Cooperatives: Will Ever the Twain Meet?
Cultural similarities in self-esteem functioning: East is east and west is west, but sometimes the twain do meet.
The costs and impacts of intermittency: An ongoing debate : "East is East, and West is West, and never the twain shall meet."
Theoretical and Empirical Studies of Producer Cooperatives: Will the Twain Ever Meet?"(with John Bonin and Louis Putterman). Journa...