The earth takes a year to make a circuit of the sun.
地球绕太阳运行一周需要一年的时间。
The trees form a natural protection from the sun's rays.
树木起天然的'保护作用，遮挡了阳光的照射。
She rolled over to let the sun brown her back.
她翻了个身，让太阳把她的背晒黑点。
The earth takes a year to orbit the sun.
地球绕太阳一周要一年的时间。
Even if you have dark skin, you still need protection from the sun.
即使你皮肤黝黑，仍需要防晒。