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 .
