名词
中文翻译：浮力调节器
同义词：
['floating collar', 'floater', 'flotation device']
例句：
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1. The dog was wearing a flotation collar to keep it from drowning.
这只狗戴着一个浮力调节器，以防它溺水。
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2. The scientist useda flotation collar to study thebehavior of fish in the water.
科学家使用一个浮力调节器来研究水中鱼类的行为。
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3. The child was wearing a flotation collar while swimming in the pool.
孩子在游泳池里游泳时戴着一个浮力调节器。