随着我国“世界遗产”数量的增加，遗产旅游正日益成为旅游业的一个热点。
With the growth of the world heritage, the heritage tourism is becoming a hot point of the tourism in China.
随着各国经济交往的日益密切，国家间缔结的避免双重征税协定的数量也不断增加。
Following the increase in international trade and investments, more and more bilateral tax treaties are created to avoid international double taxation.
随着气体钻井数量的增加，钻具失效问题日益突出，已影响到气体钻井的安全和推广应用。
However, with the well number increasing, the drilling tool failure is outstanding gradually, which has safe effect and extends the application of air drilling.
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