Caerulein
雨蛙肽
🗣️ 情景例句
Are there any tours for the Grand Canyon?
有到大峡谷的旅游团吗？
I'd like to explain what makes this factory special.
我要向你说明本工厂的特性。
Why didn't you tell me then?
为什么那时不告诉我呢？