在过去几年里日益关注人们，以及特别是青少年，过度使用日光浴浴床使皮肤变黑，这在社会角度被认为是可取的。
There has been mounting concern over the past several years that people and in particular, teenagers are using sunbeds excessively to acquire tans which are seen as socially desirable.
这名医生解释说，他可以将血管缝合到健康的肢体里，使肢体在数天之内因为坏疽而变黑。
The doctor explains how he can stitch up blood vessels in a healthy limb, causing it to blacken with gangrene over a few days.
屏幕变黑了；他通过加上褐色使颜色变暗了。
The screen darkened; he darkened the colors by adding brown.
设计者倾向于控制程序是显而易见的，在程序中通过使菜单项和控件变灰或变黑，不断的试图控制用户的走向。
GUI designers' predilection for control is evident in applications that continually attempt to control user navigation by graying and blackening menu items or controls within an application.
惠氏的卖点是叶黄素，说是对视力好，但是查资料却说容易使人变黑。
Wyeth is a xanthophyll of the selling points, that is a good vision, but easy to search information that is black.
彻底美白？纯净美白因子有效淡化肤色，调节导致肌肤变黑的黑色素形成，有助改善晦暗肌肤，使肌肤变得洁白无瑕，焕发净。
Thoroughly whiten: Pure whitening factor can effectively fade tone, restrain the production of melanin, powerfully fade dull tone and make skin white, clear and shining.
至于日晒方面，真正可怕的不是使皮肤变黑，而是因日光所造成的斑疹一旦引起这种发炎现象，即使治疗之后，也很容易引起黑斑，因此需要小心。
The sun, the real black skin is not terrible, but the rash caused by sunlight Once the cause of this inflammation, even after treatment, it can easily lead to dark spots, so be careful.
在18世纪，鼠海豚被描述为非常普遍的，他们有时使海水变黑，因为它们生长是靠喘气。
In the 18th century, porpoises were described as so common they sometimes darkened the sea as they rose to draw breath.
黑色素使皮肤变黑是人被晒黑的原因。
然而在这一地区，当地人有意咀嚼槟榔使牙齿变黑以赢得社会威望。因此可以理解该广告收效甚微。
However, in this area some local people deliberately chew betel nut in order to achieve the social prestige of darkly stained teeth, so the AD was understandably less than effective.
去除皮肤表层的老化细胞，有效抑制黑色素生成，防止肌肤变黑，使肌肤回复自然白皙；
Peel off aged cells from epidermis, effectively inhibit melanin, protect skin from dull tone, and recover skin to natural and white state;
滋润不油腻，有效防止肌肤变黑，使肌肤回复自然白皙，肤色明显净白，更富有光泽，肤色更均匀；
Moist and non greasy, effectively protect skin from dull tone, recover skin to natural and white state, skin appears white and bright with even tone;
滋润不油腻，有效防止肌肤变黑，使肌肤回复自然白皙，肤色明显净白，更富有光泽，肤色更均匀；
Moist and non greasy, effectively protect skin from dull tone, recover skin to natural and white state, skin appears white and bright with even tone;
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