You can start adding speed by warming up for a mile and then running at a faster pace (breathing heavy but still in control) for a minute and then recovering at an easy pace for a minute.
你可以先跑个加速度的一英里来热热身，再加速度跑个一分钟，然后再恢复到一个平缓的速度跑个一分钟。
Beyond warming the atmosphere, black carbon can also speed the melting of glaciers by literally turning them black - soot on snow makes the ice heat up faster.
除了给大气加热，炭黑还能覆盖冰川表面，便其表面颜色变黑，从而加速冰川融化。
Beyond warming the atmosphere, black carbon can also speed the melting of glaciers by literally turning them black - soot on snow makes the ice heat up faster.
除了给大气加热，炭黑还能覆盖冰川表面，便其表面颜色变黑，从而加速冰川融化。
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