Howell's tests
[医] 豪威耳氏试验(检凝血酶原)
🧩 词语组成解析
n. 测验（test的复数）
🗣️ 情景例句
He's on the phone.
他在电话上。
To pull a trailer
拖汽车房屋
This is because they had no natural enemies until the arrival of humans and therefore did not need to develop flying wings.
这是因为人类到达这里之前，这些鸟没有天敌，因此，它们不需要发育飞行的翅膀。