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Use a broad-spectrum sunscreen that blocks both uva and uvb rays .

用一种普遍使用的可以阻挡uva和uvb射线的防晒霜。

Clear double pane windows will reject almost all of the uvb energy .

双层清玻的玻璃窗户几乎能阻绝uvb能量.

Tanning lamps give out uva and usually uvb rays as well .

照晒棕褐色皮肤的灯发出长波紫外线和一般的短波紫外线。

That 's because uva rays penetrate deeper into the skin than uvb rays .

主要是因为uva射线相比uvb射线而言，射入人的肌肤更深。

The uva component is important as window panes -- at home or office or car -- often block uvb but not uva rays .

抗uva成分非常重要，因为家里、办公室或汽车上的窗玻璃通常只能阻挡uvb而阻挡不了uva。