用风速计量度平均风速，用一条轻的线和一个指南针找出风向。
Measure average wind speed by anemometer . Find out wind direction by light thread and compass.
用风速计量度平均风速，用一条轻的线和一个指南针找出风向。
Measure average wind speed by anemometer. Find out wind direction by light thread and compass.
睡觉的时候，只给你或者你的小孩盖一床被单或者一条轻毯子。
At bedtime, cover yourself or your child with just a sheet or light blanket.
睡觉的时候，只给你或者你的小孩盖一床被单或者一条轻毯子。
At bedtime, cover yourself or your child with just a sheet or light blanket.
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