The earth takes a year to make a circuit of the sun.

　　地球繞太陽(yáng)運(yùn)行一周需要一年的時(shí)間。

　　The trees form a natural protection from the sun's rays.

　　樹木起天然的保護(hù)作用，遮擋了陽(yáng)光的照射。

　　She rolled over to let the sun brown her back.

　　她翻了個(gè)身，讓太陽(yáng)把她的背曬黑點(diǎn)。

　　The earth takes a year to orbit the sun.

　　地球繞太陽(yáng)一周要一年的時(shí)間。

　　Even if you have dark skin, you still need protection from the sun.

　　即使你皮膚黝黑，仍需要防曬。