The workers at Chernobyl reactor 4 were performing a test to see if the turbines could provide enough energy to keep the coolant pumps running if there was a loss of power, and if they

切尔诺贝利 4 号反应堆的工作人员正在进行一项测试，看看涡轮机是否能够提供足够的能量来保持冷却剂泵在断电时继续运转，以及它们是否能够正常运转。