Reconnoissance
n. 侦察, 搜索, 勘测
🗣️ 情景例句
You'd better be careful.
你要小心一点。
I dropped the letter in the mailbox on the corner.
我把信放到角落上的邮箱里。
It's about four hundred yards down this street.
城堡就在这条街上，（离这儿）400码左右。