Delimiting
[計] 定界的
??? 情景例句
You'd better hurry, Robbie.
你最好快點， Robbie。
I dropped the letter in the mailbox on the corner.
我把信放到角落上的郵箱里。
The aircraft was able to fly over the endless white plains without difficulty.
飛機可以毫無困難地飛過這片茫茫無際的白色原野！