Piotrowski's tests
[医] 皮奥特罗夫斯基氏试验(检蛋白质)
🧩 词语组成解析
n. 测验（test的复数）
🗣️ 情景例句
How many are there in your family?
你们家几口人？
She is hard to please.
她很难取悦。
The six students put their closed hands in front of them.
6个学生将握紧的手放在前面。