Echoranging
回声测距法
🗣️ 情景例句
and maybe you can help me set the table.
也许你能帮我摆桌子。
I should have studied last night, but I was too tired.
我昨晚应该学习，但是我太累了。
East,west，home is best.
金窝，银窝，不如自己的草窝。