这种情况需要用极大的机智来处理。

This situation needs to be handled with great ___tact.

露西的机智令人钦佩，当他们在与埃默森一家、拉维什小姐和牧师们散步时，她让夏洛特和拉维什小姐独处，以便她们闲聊。

One can't help admiring Lucy's ___tact, when during their ramble with the Emersons, Miss Lavish and the clergymen, she leaves Charlotte and Miss Lavish on their own, so that they could gossip.

外交官在讨论敏感的国际问题时必须运用机智。

Diplomats must exercise ___tact when discussing sensitive international issues.