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滑滑板时带护肘和护膝是必要的.Elbow pads and knee pads are essential on a skateboard.所有参赛者比赛时都必须佩带安全头盔及护膝、肘等可能必要的安全护具.It is mandatory that riders wear and approved safety helmet during racing.我要一副护腕和两副护膝.I want a pair of wrist protecto...
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Under the optimum condition the yield of isopropyl cyclopropane carboxylate is 92 %.在最佳反应条件下,环丙烷羧酸异丙酯的产率达92%.Isopropyl p - hydroxybenzoate was synthesized with toluene - p - sulfonic acid as catalyst.以对 甲苯 磺酸为催化剂合成了尼泊金异丙...
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Flipper? Maybe those frisky crowd - pleasers at the aquarium?鳍状肢? 或许是水族馆中那些活泼逗人的生物?I felt frisky, as if I might break into a dance.我感到很欢快, 似乎要跳起舞来.His horse was feeling frisky, and he had to hold the reins tightly.马儿欢蹦乱跳...
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膀胱照相术...
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luff的音标：luff的英式发音音标为：[lʌf]luff的美式发音音标为：[lʌf]...
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People were booing and throwing things at them.人们向他们喝倒彩、掷东西。You can hear the crowd booing.你可以听到人群中的一片呸呸声.She kept her dignity despite the booing.尽管嘘声四起,她依旧泰然自若....
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n.生日宴会...
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“增效”的拼音为：zēng xiào...
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apercu的音标：apercu的英式发音音标为：[ˌæpeə'sju:]apercu的美式发音音标为：[ˌæper'su]...
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n.口香糖，橡皮糖...
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cosmopolitan的近义词/同义词有：worldly, liberal, cultivated, broadminded, urbane, sophisticated, worldly-wise, cultured, catholic, pandemic, global, metropolitan, world-wide, universal, international, cosmopolite, traveller, glob...
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Bondsmen may withhold their services arbitrarily.保人可以任意地不提供服务....
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“蓝晶石”的拼音为：lán jīng shí...
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“次优化”的英语可以翻译为：[计] suboptimization ...