Thfa
[化] 四氢叶酸
🗣️ 情景例句
Hope to be a bigger help on the new community-center project.
希望能在新社区中心这件事上提供更大的帮助。
Don't swap horses when crossing a stream.
行至中流不换马；危难之时不宜作大变动。
I'm afraid that he'll forget it if he misses so many lessons. He may even fail his Chinese exam.
如果他再缺这么多课，恐怕他会忘记很多的。他的汉语考试甚至会不及格。