Leach's tests
[医] 利奇氏试验(检甲醛)
🧩 词语组成解析
n. 测验（test的复数）
🗣️ 情景例句
Well, before I go to college,
嗯，在我进大学之前，
How many passengers were on the train?
在火车上有多少旅客？
Is that an English car?
那是辆英国产的小汽车吗？