Rectal valves
[医] 直肠横襞
🧩 词语组成解析
a. 直肠的\\n[医] 直肠的
n. 阀门；真空管；瓣膜（valve的复数）
🗣️ 情景例句
It's small,
它小小的，
I invited him ti come down, but he wouldn't.
我请他下来，但是他不肯。
That's difficult!
那就难啦！