Machine possibilities for counteracting human error range from simple hardware interlocks to complex on-line computation. Except where specific sequences of operations must be followed it is more appropriate to place such 'checks' on the effects of actions, as this does not make assumptions about the strategy used to reach this effect. Under manual control, human operators often obtain enough feedback about the results of their actions within a few seconds to correct their own errors (Ruffell-Smith. 1979), but Wiener and Curry (1980) give examples of humans making the same types of errors in setting up and monitoring automatic equipment, when they do not get adequate feedback. This should perhaps be designed in. Kreifeldt and McCarthy (1981) give advice about displays to help operators who have been interrupted in mid-sequence. Rouse (1981) suggests computer monitoring of human eye movements to check that instrument scanning is appropriate, for example to prevent tunnel vision.
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石油是供应链运转的驱动力，无论是驱动手机制造设备的机械，还是为运输卡车提供动力的柴油，都离不开它。
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# Pass environment variables to the server process