雅思写作常用词汇：维系生命的
<p> <span word="life">life</span>-<span word="sustaining">sustaining</span></p><p> -<span word="eg">eg</span>: <span word="Water">Water</span> <span word="is">is</span> <span word="life">life</span>-<span word="sustaining">sustaining</span>, <span word="however">however</span>, <span word="it">it</span> <span word="is">is</span> <span word="contaminated">contaminated</span> <span word="by">by</span> <span word="th">th</span> <span word="epollution">epollution</span> <span word="discharged">discharged</span> <span word="by">by</span> <span word="chemical">chemical</span> <span word="factories">factories</span>.;</p><p> <span word="preserve">preserve</span>/<span word="protect">protect</span>/<span word="conserve">conserve</span></p><p> -<span word="eg">eg</span>: <span word="Its">Its</span> <span word="the">the</span> <span word="compelling">compelling</span> <span word="responsibility">responsibility</span> <span word="of">of</span> <span word="every">every</span> <span word="one">one</span> <span word="to">to</span> <span word="preserve">preserve</span> <span word="the">the</span> <span word="envirnment">envirnment</span>.</p><p> </p>
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