第三人称单数： darkens
过去式： darkened
过去分词： darkened
现在分词： darkening

The calf will probably darken as it matures .

小牛在成长过程中毛色可能变黑。

Avoid tanning " accelerators " or tanning pills that claim to speed up the body 's production of melanin or darken the skin .

避免那些声称可以加速产生身体黑色素或者是让你的皮肤变黑的晒黑“加速器”或者是晒黑的药物。

Then , when snow or rain wash them onto an ice floe , they darken its surface and thus cause it to melt faster .

随后，雪或雨水将他们冲刷到冰面上，冰的表面会变黑，因而融化的也更快。

Black carbon , which absorbs heat from the sun , also accounts for anywhere from 10 % to 45 % of the contribution to global warming , and is linked to accelerated losses of glaciers in asia , because the soot deposits darken ice and make it more vulnerable to melting .

吸收太阳热量的黑碳，占全球变暖责任的10%至45%，也与亚洲冰川的加速消融有关联，因为煤烟污垢沉积物会将冰变黑，使它更容易融化。

If we see a person first in a good light , it is difficult subsequently to darken that light .

如果我们第一次见到一个人是在光线好的地方，那么以后，在我们的印象里他的形象就很难变暗。