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单词识记： energyisland protectwaste atmosphere balance strait citizen desert ocean population range pure rubbish valley wave phenomenon survival consequence decline 短语扫描： protect sb./sth.from...保护某人/物不受…… waste sth.on sb./sth.把某物浪费在某人/物上 off the coast 在沿岸的海面上 under the protection of 在……的保护下 a wide range of各式各样的 wave goodbye to sb.向某人挥手告别 as a consequence/in consequence of由于；因为……的缘故 come about 尤指未经计划地发生；产生 ageing population人口老龄化 bring/get...under control 使……受控制 [跟踪训练] 在空格处填入适当的词(1个单词)或所给词的正确形式 1．Had I kept a (balance) diet for the past few years，I would not have stomach trouble now. 2．If cancers are spotted early there’s a high chance of | 
