Enkephalin
[化] 脑啡肽
🗣️ 情景例句
It's seventy-five cents for adults and thirty cents for children under twelve.
大人75美分，12岁以下的小孩30分。
If you want knowledge, you must toil for it.
若要求知，必须刻苦。
The old lady though the was a fussy creature,
老妇人觉得巡官大惊小怪，