学个词Learn a Word 第1289期 knock out（在线收听）

　　今天我们要学的词是knock out。 Knock out, 有毁坏的意思。 "The Japanese government is conducting stress tests on all its nuclear plants following the March earthquake disaster which knocked out the cooling systems at Fukushima," 三月地震毁坏福岛核电站冷却系统后，日本政府目前正在对国内所有核电站进行压力测试。 "A severe thunderstorm knocked out electricity for more than 4000 homes across Central Virginia over the past weekend," 上周末一场暴风雨造成维吉尼亚中部地区4000多户住家断电。好的，今天我们学习的词是knock out...