看故事学英语单词：专心致志
<p>导读：<span word="be">be</span> <span word="concentrating">concentrating</span> <span word="on">on</span> <span word="sth">sth</span>-- 大家是不是一直对<span word="be">be</span> <span word="concentrated">concentrated</span> <span word="on">on</span> <span word="sth">sth</span>和<span word="be">be</span> <span word="concentrating">concentrating</span> <span word="on">on</span> <span word="sth">sth</span>感到有些迷惑呢?今天就有我来给大家讲解一下吧~</p>
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