18．這只訓(xùn)練有素的警犬對任何聲響都很警覺．（alert）The well-trained police dog is alert to any sound．．

分析 The well-trained police dog is alert to any sound．

解答 The well-trained police dog is alert to any sound．
這是對警犬的一種客觀評價，所以使用一般現(xiàn)在時．
分析句子的意思可知，本句可以使用一個主系表結(jié)構(gòu)的簡單句即可準確表達．be alert to sth對…警覺；well-trained訓(xùn)練有素的．

點評 翻譯題在解題時首先要確定好句子的時態(tài)，然后要把握好短語表達，最后要注意句子結(jié)構(gòu)．

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