Underdrainage
n. 暗渠排水, 地下排水
🗣️ 情景例句
Thank you for taking care of me here.
多谢您的周到招待。
That house is for sale. It has central heating.
此房出售，房子里有供暖设备。
The are no batteries in the radio.
收音机里没电池。