Hemicone
半锥体
🗣️ 情景例句
The plane's been delayed 10 minutes.
飞机晚点了十分钟。
Do you live across from the Public Hall?
你在大会堂对面居住吗？
It is not long before they are so accustomed to swimming that they can pick up weights from the floor of the pool.
他们很快便适应了游泳，以致能捡起池底的物品。