Erv
[医] 呼气储备量
🗣️ 情景例句
He is still unable to express himself in English.
他仍然不能用英语表达自己的意思。
When all men speak no man hears.
人人都讲话，无人去听它。
The most wonderful piece of machinery on show was Nasmyth's steam hammer.
其中最奇妙的是内史密斯的蒸汽锤。