must
v. /mʌst/ A1
必须；应当
Used to say that something is necessary or compulsory.
仙境例句
“You must wake up and tell us a story!” they both cried to the Dormouse.
“你得醒过来给我们讲个故事！”他们俩一齐冲睡鼠喊道。
原著这一句
“Yes, but some crumbs must have got in as well,” the Hatter grumbled: “you shouldn’t have put it in with the bread-knife.”
“是啊，可肯定掉进面包屑了，”帽匠抱怨说，“你真不该用切面包的刀去抹黄油。”
卡罗尔原著 · 第 7 章