The things that bring the greatest joy carry the greatest potential for loss and disappointment.
给我们带来最大快乐的事情，也有可能带来最大的损失和失望。
2
This type of storage is no guarantee against loss in a disaster but if you must evacuate it will be easy to carry with you.
这种方式不能确保应对灾难中的损失，但如果你必须被疏散，这个东西很容易随身携带。
3
Similarly, one of the key technology gaps hampering the U.S. energy grid is a lack of understanding regarding superconductors -- materials that can carry electricity with no energy loss.