keychain
noun/ˈkiːtʃeɪn/
/ˈkiːtʃeɪn/
(especially North American English)- a small chain, often attached to a metal ring and a decoration, that you use to hold keys together
钥匙串：通常用于连接金属环和装饰品的小链，用于将钥匙固定在一起 - I brought him back a nice keychain as a small memento of my visit.
我给他带回了一个漂亮的钥匙扣作为我这次访问的小纪念品。
- I brought him back a nice keychain as a small memento of my visit.