以下为句子列表：
英文: Calculating the energy of a vacuum state is a difficult problem and usually depends on finding suitable approximations.
中文: 计算真空态能量是个困难的问题，而且往往取决于是否能够找到贴切与合适的逼近方式。
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英文: FYDSserial luxurious vacuum packer can complete the whole process of pumping air into vacuum state, sealing, lettering, cooling and exhaust in terms of the process, but just need to press the vacuum cover.
中文: 产品说明：FYDS系列豪华型真空包装机只须按下真空室盖即可自动按设定的程序完成抽真空、封口、印字、冷却、排气的全过程。
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英文: TW serial luxurious vacuum packer can complete the whole process of pumping air into vacuum state, sealing, lettering, cooling and exhaust in terms of the process, but just need to press the vacuum cover.
中文: 产品说明：TW系列豪华型真空包装机只须按下真空室盖即可自动按设定的程序完成抽真空、封口、印字、冷却、排气的全过程。
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英文: Vacuum packer can complete the whole process of pumping air into vacuum state, sealing, lettering, cooling and exhaust in terms of the process, but just need to press the vacuum cover.
中文: 产品说明：真空包装机只需按下真空盖即自动按程序完成抽真空、封口、印字、冷却、排气的全过程。
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