Litmus test
[机] 石蕊试验
🧩 词语组成解析
n. 石蕊\\n[化] 石蕊
🗣️ 情景例句
I'm tired and hungry.
我累了， 也饿了。
The meat packing industry is developing fast.
肉类加工业发展迅速。
About once a month. Not too often, because neither of us has much time. We both have too much work to do.
大约每月一次。不太经常写信，因为我俩的时间都很紧。我们都有做不完的事。