词典释义：
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The Aquascum 2003 is an all-purpose, self-cleaning maintenance-free, salt-water purifier that is guaranteed to extend the life of your aquarium fish.
水得清具有自动清洁免于维护污水过滤等功能，保证大大延长你水族箱里的鱼的寿命。
《Finding Nemo》《海底总动员》
双语例句
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It is maintenance free and unnecessary to adjust or clean lens.
激光器无需进行任何维护，也不用调整或清洁镜片。
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Rugged: Virtually indestructible and practically maintenance free.
坚固：几乎无法毁坏，不需维修。
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Brushless Motor, imported bearing from Europe, smooth running and maintenance free.
无刷电机驱动，欧洲进口轴承，运行平稳，免维护。
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It's durable and maintenance free with a coat of crisp, white powder coating over steel.
它的耐用和维修免费的和清晰的，对钢材的白色粉末涂料大衣。
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Recent studies show that Japanese cars are still more maintenance free than American cars.
最近的研究显示，日本的车在免维修这一点上，仍超过美国车。