大越哥教你读懂长难句：每日1练，3.8（2）

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Additional social stresses may also occur because of the population explosion or problems arising from mass migration movements-themselves made relatively easy nowadays by modern means of transport.
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主干是Additional social stresses may also occur，后面的Because of引导一个原因状语，这是个简单句，只有一套主谓，explosive可以做名词，炸药；mass，大量的，有个长得差不多的词mess，动词，弄乱，常用搭配，mess up；讲一个区分，nowadays，now，Now指的是现在，就是此刻，而nowadays是指如今，现今，是指从过去到现在或现在之前的一段时间，themselves是反身代词，指代前面的movements，破折号解释说明，后面的made，过去分词做后置定语，可以变化成一个定语从句which were made.

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