Pollak's tests
[医] 波拉克氏试验(检尿中黑素)
🧩 词语组成解析
n. 测验（test的复数）
🗣️ 情景例句
are important for the sales of your book.
对于你这本书的销售很重要。
Have you ever thought about becoming a professional musician?
你曾经考虑了成为一个职业的音乐家吗？
Bison were killed for their meat, while their fur provided warm clothing during cold winters.
他们杀野牛，吃野牛肉，用野牛毛皮制成冬季御寒的衣服。