... open drain 排水明沟 pack drain 袋装砂井 paper drain 纸板排水 ...
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pack drain
包排水
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Sanyo expected the pack to be popular in offices to allow laptops to run processor-intensive programs that would otherwise drain battery life very quickly.
BBC: NEWS | Technology | Laptops with fuel cells approach
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