That's the limiting factor for both sun and wind energy.

这就是利用太阳能和风能的限制性因素。

youdao

Use a broad-spectrum sunscreen of sun protection factor 15 +.

使用防晒指数15 +的广谱防晒霜。

youdao

SPF is really sunburn protection factor, even though we call it sun protection factor.

SPF实际上是“防晒伤指数”，虽然我们常称它为“防晒指数”。

youdao

SPF is really sunburn protection factor, even though we call it sun protection factor.

SPF实际上是“防晒伤指数”，虽然我们常称它为“防晒指数”。

youdao