Semidiameter
n. 半径
🗣️ 情景例句
Your birthday is tomorrow, isn't it?
你明天生日 ，是吗？
You'll get hurt, if you don't watch out.
你不注意的话，就会受伤。
Which may keep company with the vessel for an hour without visible or more than occasional movement of wing.
它们随船飞行一小时也难得见其扇动一下翅膀。