Sentry duty
na. 步哨勤务\\n
🧩 词语组成解析
sentry
['sɛntri]
n. 哨兵;警卫;
🗣️ 情景例句
the autograph of somebody who may be famous someday.
将来有可能成名的人的亲笔签名。
The milk in the refrigerator has begun to turn sour.
冰箱里的牛奶开始腐败了。
'I was in my office as usual,' answered the Ambassador.
“我和往常一样，在办公室里，”大使回答说。