水上摩托车是一种特别致命的水上娱乐活动。
Water scooters are a particularly deadly form of water recreation.
有岛上许多水上娱乐活动。
如果没有这样的规定，水上摩托车引发的悲剧肯定会成倍增加，许多海滩会变得不够安全，无法开展娱乐活动。
Without such regulations, tragedies involving water scooters are sure to multiply, which makes many beaches unsafe for recreation.
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