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使用电脑而无需磁盘碎片整理，从来不用。
Run my computer without needing to defragment my hard drive, ever.
youdao
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激光器无需进行任何维护，也不用调整或清洁镜片。
It is maintenance free and unnecessary to adjust or clean lens.
youdao
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激光器无需进行任何维护，也不用调整或清洁镜片。
It is maintenance free and unnecessary to adjust or clean lens.
youdao