"We can raise it up again after a year to change the batteries. That means we can avoid using divers, which is a really risky operation that we wanted to avoid," he said.
Discard old data: evict what's already buffered to make room，更多细节参见91视频
The U.S. women also beat Canada 2-1 in overtime, the first time the Americans swept both Olympic hockey tournaments. The celebration of the twin victories has been shadowed by U.S. politics almost since the final horn of the men’s game.，这一点在safew官方下载中也有详细论述
代码重构：它没有直接甩代码，而是先思考了“设计模式”的选择（工厂模式 vs 策略模式），最终选择了适合扩展的策略模式。。heLLoword翻译官方下载对此有专业解读