Perls' test
[医] 珀耳斯氏试验(检含铁血黄素)
🧩 词语组成解析
🗣️ 情景例句
It was not until yesterday that I noticed it.
我一直到昨天才注意到它。
That nation is famous for its tourism.
那个国家以旅游业闻名。
He waited until the volcano became quiet and he was able to return two days later.
他等到火山平静下来，两天以后又返回去。