And that's the difference between problems that are additive, like CO2, 这个就是可添加性问题，像二氧化碳问题， which we go slowly up and then we tip, and problems that are depletive, in which we lose what we have, which
One of our graduate students then says, well, 我们的一个毕业生说，好吧 how does a driverless car communicate with pedestrians? 这个无人驾驶的车，怎样提防行人呢？ You have nobody to make eye contact with. 没有司机看着它啊 You don't kn
but perhaps you are hoping to remotely touch someone you'll never meet 有可能 你会同遥远的未曾相识的人产生联系。 the Spirit, Opportunity and Curiosity rovers which are on Mars 勇气号 机遇号 好奇号火星探测器。 are each fitted with a
“Four: choose your friends because you feel most like yourself around them, 第四点：广交益友，因为在朋友身边你才能找到自己， because the jokes are easy and you feel like you’re in your best outfit when you’re with them, even
