单词：power per piston area
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VOICE ONE: This is Bob Doughty. VOICE TWO: And this is Steve Ember with EXPLORATIONS in VOA Special English. Today we tell about Hoover Dam. (MUSIC) VOICE ONE: Our report today about Hoover Dam must begin with the Colorado River. This river made the
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今天我们要学的词是outage。 Outage指服务或供应中断。Power outage停电。Water outage停水。I was trapped in an elevator when a power outage occurred, 停电时我正好被困在了电梯里。A major power outage caused some flig
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