Oil is traded on global markets, so even the oil produced in the U.S. has risen in price based on what’s happening in the Middle East. And for many American oil producers, “if you put more wells in the ground, there’s about a six-month lag before you get that production uplift,” Salazar said.
The first two requirements (“Efficient” and “Fine-grained”) are important for performance. Imagine a large spreadsheet with millions of cells containing formulas — it would be a huge waste of resources to recalculate every single cell, every time any input changes. Similarly, you don’t want to calculate the value of a cell multiple times if you can help it. In general, we want to do the minimum amount of work possible.
，更多细节参见新收录的资料
仅仅半年以后，iPhone 5 发布，而这次 iPhone 有个大事件，丢掉了过去一英寸宽的接口，取而代之的是一个小得多的 Lighting 接口。，详情可参考新收录的资料
The 20-year-old British sprinter Matthew Brennan rocketed out of an accelerating pack to win the Flemish classic Kuurne-Brussels-Kuurne for team Visma-Lease-a-bike on Sunday.
[82]出院人次是指报告期内所有住院后出院的人次数，包括医嘱离院、医嘱转其他医疗机构、非医嘱离院、死亡及其他人次数，不含家庭病床撤床人次数。