Valerolactam
戊内酰胺
🗣️ 情景例句
I could tell something was up by the look on their faces.
我一看他们的脸色就知道有事。
A friend is a second self.
朋友是另一个我。
They covered 120 miles in a single night.
他们仅一夜就走了120英里路。