Looking up, looking down, measuring the distance, figuring just the right wind direction and speed.

他往上看看，往下看看，测量了一下距离，又计算了适当的风向和风速。

youdao

Looking up, looking down, measuring the distance, figuring just the right wind direction and speed.

他往上看看，往下看看，测量了一下距离，又计算了适当的风向和风速。

youdao