她的回答总是那么机灵。

Tā de huídá zǒng shì nà me jī líng.

Her answers are always so clever.

他虽然不多说话，但做事很机灵，也很可靠。

Tā suīrán bù duō shuōhuà, dàn zuòshì hěn jīling, yě hěn kěkào.

Although he doesn’t talk much, he is very smart in doing things and also very reliable.

他是个机灵的销售员，总能找到顾客的需求。

Tā shì ge jī líng de xiāo shòu yuán, zǒng néng zhǎo dào gù kè de xū qiú.

He is a clever salesperson who always finds customers' needs.