stand by lighting 备用照明
The side lighting provided by the newly risen sun created mysterious shadows behind the stand of riverside cypress.
刚刚出山的太阳的侧向照明构成了挺立在河畔的柏树后面的神秘阴影。
There should be a reliable electricity supply and emergency lighting. When necessary, a stand-by power supply should be available for the support of important equipment.
有可靠的电力供应和应急照明。必要时，重要设备如培养箱、生物安全柜、冰箱等应设备用电源。
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