Coproporphyrin
粪卟啉
🗣️ 情景例句
I'd like to know more about...
我想知道其他关于…
How long have you been studying English?
你学了多长时间的英语了？
I've been working at a meat factory for about two months now.
大约两个月来，我一直在一家肉厂干活。