Valerolactam
戊内酰胺
🗣️ 情景例句
When will you be through with your homework?
你的家庭作业什么时候可以做完？
Did you go play ball last night?
你昨晚去玩球了吗？
The workers all wear thick clothes and glassed over their eyes.
工人们作都穿着厚厚的衣服并且戴着眼镜。