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1. The automatic level-regulator in the car helps to keep the engine running smoothly.
汽车中的自动水平调节器有助于保持发动机平稳运行。
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2. The level-regulator on the thermostat is designed to prevent the temperature from dropping too low.
恒温器的调节器设计用来防止温度过低。
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3. The engineer used an automatic level-regulator to make sure the water level was always correct.
工程师使用自动水平调节器来确保水位始终正确。