在过去十几年中，这种地震发生了200起，2005年发生的次数是1993年的六倍。
There have been 200 of them in the last dozen years; in 2005 there were six times as many as in 1993.
在过去十几年中，这方面的研究工作取得了相当可观的进展，并已成为应用数学家，物理学家、化学家、生物学家共同感兴趣的领域。
In the past ten years or more, the research work in this field has made remarkable progress and has become an subject attracted many mathematicians, physicists, chemists and biologists.
在过去的十几年中，SAG和AFTRA已经有了对诸如与AMPTP合作协议的谈判，但是由于管辖范围的争论使得AFTRA宣称这次很可能继续单独进行。
For decades SAG and AFTRA have negotiated such agreements with the AMPTP jointly, but jurisdictional disputes prompted AFTRA to proclaim that it would proceed separately this time.
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