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1.The forced non-liner oscillation of the system is a critical factor in its stability.
系统的强迫非线型振动是其稳定性的关键因素。
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2. The engineers were forced to take action due to the sudden drop in oil prices.
由于油价的突然下跌，工程师们被迫采取行动。
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3. The scientist discovered a new type of force that could be used to control the forced non-liner oscillation of an object.
科学家发现了一种新的力，可以用来控制物体的强迫非线型振动。