Its primary advantage is that the life expectancy of the switches is much greater than with hot switching.

其主要优点是开关的预期寿命比热切换长得多。

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With relatively large relays, it is even possible that hot switching must be used to ensure good contact closure.

对于相对较大的继电器，为了确保触点良好闭合，也可能必须采用热切换。

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Hot switching may be required when the interval from when power is applied to the point when the measurement is made must be closely controlled.

当必须严格控制从施加电压到进行测量之间的时间间隔时，就需要采用热切换。

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Although Monsanto has promised to put its terminator-gene system in deep-freeze, the molecular switching that underlies it remains a hot topic at many of the world's leading agri-biotechnology firms.

ECONOMIST: Terminator genes