一听到这个扫兴的消息，急得我扭着背心上仅剩的那一颗钮扣。

At this dismal news, I twisted the only button on my waistcoat round and round.

youdao

舞狮者穿各色灯笼裤，上身穿密钮扣的唐灯笼袖衫或背心。

WuShiZhe wear assorted knickerbockers, and dressed in dense buttons of tang lantern sleeve unlined upper garment or vest.

youdao

背心上的一粒钮扣松了。

One button on the vest is loose.

youdao