Leucoflavin
无色核黄素
🗣️ 情景例句
I don't know what you are driving at.
我不知道你到底想说什么。
Good. I'll take it right now, if possible.
好，如果可能的话，我现在就要租一辆。
They had a definite meaning, for they were as near as early man could get to writing.
它们有着一定的含义，因为它们已接近古代人的文字形式。