这个包包的扣子设计得很精致。

zhège bāobāo de kòuzi shèjì de hěn jīngzhì.

The buttons on this handbag are designed very delicately.

请扣好安全带，开始启动汽车。

qǐng kòu hǎo ānquándài, kāishǐ qǐdòng qìchē.

Please fasten your seatbelt before starting the car.

这件外套的扣子掉了一个。

zhè jiàn wàitào de kòuzi diào le yīgè.

One button of this coat fell off.