他告诉大家要使用天花板上垂下的救生索，那是一条穿有木质球果的绳子，类似游泳池内的浮标。
He said to use the lifeline running along the ceiling, a slender rope threaded through wooden cones, like floats in a swimming pool.
他告诉大家要使用天花板上垂下的救生索，那是一条穿有木质球果的绳子，类似游泳池内的浮标。
He said to use the lifeline running along the ceiling, a slender rope threaded through wooden cones, like floats in a swimming pool.
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