The latest post office machines can sort letters at 30,000 items an hour, which is much faster than manual sorting.
邮局的最新机器每小时可以分拣3万份邮件，大大快于手工分拣。
Manual sorting is expensive in the rich world, which is why recyclables are often shipped to places with low labour costs.
正因为人工分类整理在富裕国家是很昂贵的，所以回收品才经常会被运到劳动力价格低的地方去。
Can automatic testing ground will volt-ampere characteristics curve traced, save manual pressure regulation, artificial records, sorting, tracing curves, and so cumbersome labor.
可全自动地将伏安特性曲线测试描绘出来，省去手动调压、人工记录、整理、描曲线等烦琐劳动。
Can automatic testing ground will volt-ampere characteristics curve traced, save manual pressure regulation, artificial records, sorting, tracing curves, and so cumbersome labor.
可全自动地将伏安特性曲线测试描绘出来，省去手动调压、人工记录、整理、描曲线等烦琐劳动。
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