Oxyhemoglobinometer
氧合血红蛋白计
🗣️ 情景例句
You must observe these simple rules.
你必须遵守这些简单的规定。
To paint
油漆
I'm very sorry. I borrowed a book from the library two weeks ago.
“很对不起。两周前我从图书馆借了一本书。