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可数名词
n.[C] 方法；计划
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something thought out; a plan
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He tried various devices to do the work.
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他想方设法做那项工作。
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可数名词
n.[C] 装置；仪表；器具
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an invention used for a special purpose; a machine
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The switch is the control device of an electric circuit.
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开关是电路的控制部件。
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He made a device to make the door shut by itself.
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他做了一个使门自动关闭的装置。
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