以下为句子列表：
英文: As a result,they have lost the parachute they once had in times of financial setback-a back-up earner (usually Mom) who could go into the workforce if the primary earner got laid off or fell sick.
中文: 因此，他们已经失去了经济困难时曾有的保障，即家中主要的挣钱人一旦失业或生病，预备挣钱人（通常是妈妈）可以加入劳动大军。
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英文: Back-up disinfection system is available for all primary systems.
中文: 所有最主要的系统有备用的消毒系统。
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英文: Backseat – machined bonnet backseat provides back-up stem seal.
中文: 后座-经过精密加工的阀盖阀杆衬套实现后座阀杆密封。
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英文: Backseat – machined bonnet stem bushing provides back-up stem seal.
中文: 后座-经过精密加工的阀盖阀杆衬套实现后座阀杆密封。
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英文: Data should be protected by backing-up at regular intervals. Back-up data should be stored as long as necessary at a separate and secure location.
中文: 在常规时间间隔情况下，应当通过备份数据来保护数据。备份数据应当储存在另外一个分隔的、安全的地点。
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