太阳下山时天空的颜色变暗。

The colour of the sky deepened as the sun went down.

youdao

通常我日晒后颜色变暗，成为棕色和黑色。

I'm normally shades of tan, brown and black.

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但这种颜色暴露在阳光下将会变暗。

But this color darkens when exposed to the sun.

youdao

天然的颜色随着时间的增长会变暗，这并不影响产品的效力。

Natural color will darken over time. This does not affect the potency of the product.

youdao

天然的颜色随着时间的增长会变暗，这并不影响产品的效力。

Natural color will darken over time. This does not affect the potency of the product.

youdao