I don't know. I don't know how long can you know that there is something bigger for you, and yet you ignore that. "我们并不活在以后，而是活在当下。"一个曾经失魂落魄，无家可归，甚至需要领取救济才能维持生活的人是怎样从一个差生就是凭借着这句话拿到了哈佛的奖学金。这就
Or Malawi: we asked if a birthing center could radically reduce maternal and infant mortality. 或者在Malawi: 我们会问是否接生中心会从根本上减少母婴的死亡率。 Malawi has one of the highest rates of maternal and infant death in t
Hi, everybody. This weekend, I depart for Asia to advance American leadership and promote American jobs in a dynamic region that will be critical to our security and prosperity in the century ahead. T
In my lab, we recently made a cancer nanodetector 在我的实验室，我们最近研制出了一种癌症纳米检测器， that is so small that it could travel into the body and look for tumors. 小到可以进入全身血液循环并寻找肿瘤。 We designed it to listen for tum
