• Lake Champlain also has the same kinds of environmental problems, including pollution and nonnative sea life, as the Great Lakes.

    VOA: special.2009.01.05

  • And of course, there are still pollution problems with motorists.

    当然,机动车的污染问题依然很严重。

    我使用自行车 - SpeakingMax英语口语达人

  • Floods,droughts,pollution and climate change have created even more problems.

    VOA: special.2010.04.05

$firstVoiceSent
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