英语语法分析

Played only once, betrayal of the other is the soundest choice.

如果只玩一次，背叛对手是最合理的选择。

I believe that it is the soundest approach to keep us on intimate terms.

我相信这种开明的方法能够让我们保持亲密的关系。

Canada, at least, has the benefit of one of the world's soundest banking systems.

加拿大，至少还可以从它全球最好的银行糸统之一中获益。