Tetrahydroquinoline
四氫喹啉
??? 情景例句
You're welcome.
別客氣，歡迎你再來。
It is better to be clothed in rags, than to be clothed with shame.
寧可穿破衣，不可蒙羞恥。
China is great! We like school, and the food is good too.
中國太棒啦！我們喜歡學校，這里的吃的也挺好。