Collagens
(collagen 的复数) n. 胶原\\n[化] 骨胶原; 胶原
🗣️ 情景例句
Keep right unless overtaking.
要靠右驾驶，除非超车。
No matter what happens, don't look excited.
不管什么事情发生，你总不要显得激动。
The hunt went on for several weeks, but the puma was not caught.
搜寻工作进行了好几个星期，但始终未能逮住那只美洲狮。