Manatees, aquatic mammals inhabiting Florida's rivers and coastal waters, swim close to the surface and are frequently killed in collisions with boats.

海牛是生活在佛罗里达河流和沿海水域的水生哺乳动物，它们游到海面附近，经常在与船只相撞时被撞死。

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Most of the people were excellent boat makers and they could make boats in a variety of shapes and sizes for travelling along the rivers and in the oceans.

大多数人都是优秀的造船者，他们能制造各种形状和大小的船，以便在河流和海洋中航行。

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"In the Irrawaddy Delta, we have a logistical nightmare because of those hundreds of rivers, hundreds of small islands and... some places are only reachable by boat, inflatable boats," Byrs said.

她说：“在伊洛瓦底江三角洲，由于那里数百条河流、数百个小岛星罗棋布，纵横交错，一些地方只能乘船和橡皮船才能进去，救援物资运送的困难可想而知。”

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Sometimes it is necessary for the team to patrol on foot and sometimes they use speed boats on the rivers and canals which criss-cross the park.

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But the conservationists warn that, unless they act now, they will soon have to choose between killing off the manatee population completely or restricting boats so severely that messing about on the rivers, canals and bays of South Florida will no longer be such fun.

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Camera boats equipped with cellular phones and speakers stalk the anglers on the lakes and rivers.

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