它们的腿固定在原地，这样它们就不会摔倒。
直接用木螺丝穿透作为基座板的夹板，把2X4s的基座腿固定好。
You can use wood screws to mount those legs by drilling through the base plywood straight down into the 2x4 legs.
鲨鱼放开了Hannah的腿，但又咬住了她用腿绳固定在脚踝处的冲浪板，她再次被猛地拉进水里。
The shark let go of Hannah's leg but then grabbed her surfboard, which was attached to her ankle by a leg-rope, and she was yanked under the water again.
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