Major changes in core libraries can also present a problem when trying to achieve binary compatibility.

当尝试获得二进制兼容性时，核心程序库的重要变化也会引发问题。

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Construction temperature cracks, as a major problem influencing the quality of locks, there is no effective solution to it at present.

工程施工中温度裂缝，作为影响水闸质量的一大难题，目前尚无有效的解决方法。

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Environmental factors present in the atmosphere, increasing environmental pollution has posed a major global problem, but also lead to global warming, one of the main factors.

大气环境污染因素 目前，环境污染的日趋严重已构成一全球性重大问题，同时也是导致全球变暖的主要因素之一。

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Given that using an H-1B visa is often the only practical way to hire a foreign national to work long-term in the U.S. that would present a major problem for growth and innovation.

FORBES: Requiring Foreigners to Be Paid More Than Americans