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
Can I help you?
我可以帮上忙吗？
He went to the post office to mail a letter.
他去了邮局寄信。
Looking at his watch, he saw that it was one o'clock, but the bell struck thirteen times before it stopped.
他一看表，才1点钟，可是那钟一边敲了13下才停。