Ectotoxin
[化] 外毒素\\n[医] 外毒素
🗣️ 情景例句
Please make an effort to arrive early.
请争取早点来。
May I ask the reason for your remittance?
可以请问汇款的原因吗？
I have just received a letter from my old school, informing me that my former headmaster,
我刚刚收到母校的一封信，通知我说以前的校长