Mayer's tests
[医] 梅-霍二氏试验(检孕)
🧩 词语组成解析
n. 测验（test的复数）
🗣️ 情景例句
sacrifices have to be made by one partner from time to time.
总要有一方必须不时做些牺牲。
How long have you been studying English?
你学了多长时间的英语了？
Why not?
为什么没有？