Yasmine Sherif is the executive director of the U. N. organization Education Cannot Wait.

亚·里夫是联合国组织“教育不能等待”的执行主任。

That is because it is cheaper and cannot perform all the actions of the latest versions of Apple’s iPhone.

那是因为它更便宜并且不能执行最新版本的 Apple iPhone 的所有操。

The judge found, in part, that the hikes cannot be enforced because they were issued by an acting secretary of homeland security who was illegally promoted.

法官发现，在一定程度上，增加费用是不能强制执行的，因为他们是由一位被非法提拔的代理国土安全发布的。

" A lot was riding on my guys being able to execute their mission, " he said, adding that business leaders also have to constantly weigh risk.

“行动主要取决于我的人能不能执行他们的任务，”他说，并补充说企业领导者也必须不断地权衡风险。