单词：cases cartridges
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Cleaning and sorting plastic made out of multiple polymers can be relatively expensive, 清理和将多种聚合物制成的塑料进行分类的成本相对昂贵， especially if it is used to make low value products such as packaging. 尤其是这些
经济学人科技系列
MARGARET WARNER: The terror threat that's already shut down U.S. embassies across the Muslim world zeroed in on Yemen today after the State Department urged American citizens and many U.S. government personnel to depart. Americans and other foreigner
PBS访谈社会系列
The two men moved painfully down the bank and fell among the rocks that were scattered everywhere. They were tired and weak. Their faces showed the patient appearance that results from difficulty long endured. They were heavily burdened with blanket
2019年VOA慢速英语(一)月
The result was that the Apple engineers and managers suddenly became sharply focused on just four areas. 结果，苹果的工程师和管理人员突然高度集中在四个领域。 For the professional desktop quadrant, they would work on making t
乔布斯传
They range from the technological to the downright odorous. A study has revealed the top bugbears of office life, with slow computer systems and colleagues who bring in smelly food for lunch sitting high on the list. Colleagues who shout down the pho
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