...,极限扩,老熟丝机那样的换向作用，但与换向器一样，也出现集电环或电刷的异常磨损，电刷振动以及产生火花等弊病。特别从电刷材质来看，集电环用电刷不七赖(神崎reona),极限扩,老熟丝仅使用石墨电刷，而且为了提高电刷的电流密度，有时也使用金属石墨电刷，所以，还必须考虑异常残余膨胀等因素。
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美国国务卿康德莉扎•赖斯从去年的第四位下滑至今年的第七位。
US Secretary of State Condoleezza Rice fell from fourth place last year to seventh place.
丹·赖斯告诉他的七位员工，周一早上可以休假，享受最新一集的《权力的游戏》就好了。
Businessman Dan has told his seven employees they can take Monday mornings off to watch the latest episodes of Game of Thrones.
俄罗斯只有两个可托赖的盟友，就是他的军队和舰队， 七乐彩，这虽是老话然而是不问可知的真谛。
"Russia has only two reliable allies: its army and fleet": nobody abolished that old piece of truth. Well, maybe Hugo Chavez, Mahmoud Ahmadinejad and Raul Castro. But seriously, nobody.
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