Dihydrofolic acid
[化] 二氢叶酸
🧩 词语组成解析
🗣️ 情景例句
I have just begun to learn and my serve isn't very good.
我刚刚开始学习，发球不太好。
A change of work is as good as a rest.
调换一下工作是很好的休息。
Plenty of sleep is healthful.
充足的睡眠有益于健康。