Katzenstein's tests
[医] 卡岑斯坦氏试验(检心肌效率)
🧩 词语组成解析
n. 测验（test的复数）
🗣️ 情景例句
Well, it won't be easy.
嗯， 不很容易。
Do you have some change?
你有零钱吗？
He's only forty-one years old, and he has already been to nearly every country in the world.
他只有41岁，但他却过世界上几乎每一个国家。