The Chinese are simply blasting roads into unstable hillsides with virtually no attention paid to road location, construction practices or erosion control.

中国人只是简简单单地就在并不稳固的山坡上炸出一条公路，而实际上丝毫没有注意到道路位置、施工实践或侵蚀控制这些问题。

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However, since these approaches take no account of complexity control and have no guarantee of global minimum, they often suffer from unstable performance.

但是由于这些方法不考虑复杂度的控制以及不能保证全局最小值，所以它们的性能不稳定。

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Ball and beam system is a nonlinear and unstable system, which is designed for experiments of basic control curriculum such as feedback control.

球杆系统这样一个非线性不稳定系统是为自动控制原理等基础控制课程教学实验设计的实验设备。

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And a local entrepreneur says he doesn't like doing business elsewhere because areas outside Kurdish control are too unstable.

NPR: 10 Years After US Invasion, Kurds Look To The West