单词：perturbator
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Keep Rolling Luggage Upright With Physics物理学帮你稳住拉杆箱 If you've ever pulled a rolling suitcase through the airport, chances are you've also been annoyed by this common occurrence: the suitcase starts rocking back and forth on each w
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avaricious, [ .və'riʃəs ] adj 贪财的＝greedy 【记】见avarice 【类】stoic:perturb＝avaricious:satisfy镇定的不易被干扰＝贪财的不易被满足 【反】contented（adj 满足的）
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单词解析速记
1. perforate /ˈpɜ:fəˌreɪt/ -- (literally, bore through) make a hole or holes through; pierce; puncture The physician said the tack had gone through Betty's shoe and sock without perforating her skin. 医生说大头针穿过了贝蒂的鞋袜，但
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