With the rapid economic and social development, people's living standard has greatly improved, but the value of human life produced a certain confusion.
随着经济社会的迅猛发展，人们的生活水平有了很大提高，但同时对人的生命价值产生了一定的迷惑。
But social justice is a historical category with different connotation and forms at different stage of historical development.
但是，社会公正是一个历史范畴，在不同的社会历史阶段，有着不同的内涵和表现形式。
The research and development of low phase noise crystal oscillator will not only be with good social benefits, but also be with noteworthy economic benefits.
所以低相噪晶体振荡器研制成功不仅有良好的社会效益，而且还能带来可观的经济效益。
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