Protolignin
原(本)木素
🗣️ 情景例句
Don't count on a salary increase this year.
别指望今年会给你加薪。
Why did you get up so early?
为什么你这么早起床？
I used to travel by air a great deal when I was a boy.
我在幼年的时候，曾多次乘飞机旅行。