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1.a range of 一系列
例句：The slim booklets describe a range of services and facilities.
这些薄薄的小册子介绍了一系列服务和设施。
2.top-selling 畅销
例句：In Detroit this week, the company unveiled a new version of the focus, its top-selling car.
本周在底特律，福特发布了新款福克斯（focus）车，这是该公司最畅销的车型。
3.at least 至少
例句：He's been away for at least a week.
他走了总有一个星期吧。
4.real-world 真实的
例句：The three team assignments include a real-world application.
三个小组作业包括了一个实际的应用。
