Hemorrhoidal veins
[医] 痔静脉, 直肠静脉
🧩 词语组成解析
a. 痔的, 直肠及肛门的
n. 纹理；静脉（vein的复数）
🗣️ 情景例句
If you don't mind my asking, where did you come from?
你从哪儿来？要是你不介意我这么问的话。
I'll go skiing of the weather permits.
天气允许的话，我会去滑雪。
This is because they had no natural enemies until the arrival of humans and therefore did not need to develop flying wings.
这是因为人类到达这里之前，这些鸟没有天敌，因此，它们不需要发育飞行的翅膀。