Thfa
[化] 四氢叶酸
🗣️ 情景例句
Pardon me.
劳驾。
He failed the examination but he didn't seem to care.
他考试不及格却似乎并不在乎。
Summer comes after spring. It is the hottest season.
春天之后是夏天。夏天是最热的季节。