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1、Day 181sincere adj.诚挚的，真诚的2utility n功用，效用3utilize vt.利用4utter vt.说出adj.完全的，彻底的5variation n变化，变动6vehicle n交通工具，车辆7applause n鼓掌，掌声8appliance n器具，器械9consent n准许，同意vi.(to)准许，同意10conquer vt.征服11defect n缺点，缺陷12delicate adj.易碎的；娇弱的；精美的13evolve v演变14evolution n演变，进化15frown v/n.皱眉16frustrate vt.使沮丧17guarante
2、e vt./n.保证18guilty adj.内疚的；有罪的19jealous adj.妒忌的20jeans n牛仔裤21liquor n酒，烈性酒22liter/litre n升23modest adj.谦虚的24molecule n分子25orbit n轨道v.(绕)作轨道运行26participate v(in)参与，参加27particle n微粒28particularly adv.特别，尤其29respond vi.回答，答复；反应30response n回答，答复；反应31sensible adj.明智的32sensitive adj.敏感的，灵敏的33tremble vi.颤抖
3、1spare no effort toV(不遗余力地)例句：We should spare no effort to beautify our environment.我们应该不遗余力地美化我们的环境。Therefore，we must spare no effort to take some measures to solve this problem.因此我们必须不遗余力地采取措施解决这个问题。2Only状语部分倒装.例句：Only by doing so can we have more energy to study effectively in class.只有这样做我们才能有更多的精力在课堂上学习。3be closely related to.(与息息相关)例句：Taking exercise is closely related to health.做运动与健康息息相关。