positive: The third plane was flown into the Pentagon, which is a large building near Washington, DC that is the headquarters (or most important building) for the U.S. military.<br>第三架飞机飞向了五角大楼,也就是首都华盛顿附近的大型建筑物,美国军队的总部(或最重要的建筑)。<br>The fourth plane crashed in a field in Pennsylvania, a state that's also in the northeastern part of the country.<br>第四架飞机在宾夕法尼亚州的田野里坠毁,该州也位于美国的东北部。<br>Many people think that the hijackers had wanted to crash that plane into the White House where the president lives, but the people on the plane stopped them from doing that.<br>许多人认为劫机者想要把飞机撞向美国总统居住的白宫,但是机上的人阻止了他们那样做。<br>Almost 3,000 people died in the terrorist attacks that day.<br>那天将近有三千人死于这次恐怖袭击。<br>The attacks had a big effect on the economy, too.<br>这次袭击对经济也有着很大的影响。<br>Many businesses in the World Trade Center and nearby buildings had to close because they had too much damage and they had lost too many employees.<br>世界贸易中心及邻近大厦里的许多企业都不得不关门,因为他们受到了重创,他们损失了太多的雇员。<br>All airplanes were grounded, meaning that they we
negative: 启手机省电模式,手机发热的真正元凶就是耗电量太大,导致手机电池发热从而引起手机发烫。现在的智能手机都有省电模式,我们可以一键开启从而减少耗电量,减少手机发热.<br>关闭手机后台应用,现在大多数软件运行需求对系统要求都很高,后台软件过多,就会不断的请求手机后台数据,从而导致手机耗电快引起发热,所以不使用一个软件时就立马关闭后台运行。<br>避免长时间玩手机游戏,游戏对系统的资源消耗比较大,长时间玩手机游戏,容易导致手机cpu发热从而引起手机发热。<br>不要边一边玩手机一边充电,边充电边玩手机时,手机很容易发热,而对于某些质量不过关的手机,边充边用甚至会造成危险。<br>尽量不要用手机套或者手机壳,夏天本身就热而且再给手机加个外套,手机热量散发不出去就会引起发热,所以尽可能不要使用手机套或者外壳,不过要注意手机使用,防止磕磕碰碰。<br>上面是教给大家的手机降温小技巧! 希望对您有所帮助!如果你有更好的方法可以在下方留言评论。