Supergrass
n. <英>向警方提供大量罪犯活动情报的人（尤指本人也是罪犯的人）
🗣️ 情景例句
Don't stand on ceremony, make yourself at home.
别客气，随便吃。
I'm not sure what time I'm coming back.
我不肯定我什么时间回来。
And, because most books were not printed in Braille.
因为大多数的书本没用布莱叶文印刷。