现实是，你知道，作为一个黑人，巴拉克去趟加油站都可能被开枪打死。
The realities are that, you know, as a black man, Barack can get shot going to the gas station.
However difficult life may seem, there is always something you can do and succeed at.
除非定理是美丽的，否则它们毫无价值。
我们不能忽视煤炭的经济作用，但也不能忽视其环境影响。