Maybe you've got a swimmer and a rowboat and a sailboat and a tugboat and you set them off on their way, and the rains come and the lightning flashes, and oh my gosh, there are sharks in the water and the swimmer gets into trouble, and, uh oh, the swimmer drowned and the sailboat capsized, and that tugboat, well, it hit the rocks, and maybe if you're lucky, somebody gets across.
可能你有一名游泳选手，一艘划艇， 一艘帆船和一艘拖船。 你让他们各自出发。 暴风雨来了，电闪雷鸣。 噢天哪，水里还有鲨鱼， 游泳的人遇到了麻烦 糟糕，你的游泳选手淹死了。 帆船翻了， 拖船撞到了岩石， 如果你运气好，有人可能刚好路过。