A tan is created by UV rays penetrating the upper layers of your skin.
A tan is created by UV rays penetrating the upper layers of your skin.
晒黑机能够发射出紫外线，穿透您的上层肌肤。
A tan is created by UV rays penetrating the upper layers of your skin.
晒黑机能够发射出紫外线，穿透您的上层肌肤。