Sentinel pile
[医] 前哨痔(肛裂下端的痔)
🧩 词语组成解析
sentinel
['sentinl]
n. 岗哨，哨兵;
🗣️ 情景例句
You got it!
给你啦！
Don't cry out before you are hurt.
还没受苦，就别叫苦。
The mobile phone is as popular as the beeper nowadays.
现在手机和寻呼机一样普及。