By the time Wilson left GM, almost half of all US families fell within the middle range of income. Most were headed not by professionals or executives but by skilled and semi-skilled factory workers.

到威尔逊离开通用汽车的时候，美国几乎一半的家庭都达到了中等收入水平，而多数一家之主并非专业人士或高管，而是技能娴熟和半熟练的工厂工人。

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Soil moisture of sand grassland, semi-mobile sand and disturbed inter-dune bottomland, had distinctive variability and larger spatial change range of variability, after rainfall.

沙质草场、半流动沙地和受干扰的丘间洼地降雨后的土壤含水量异质化程度及其相关变化范围非常明显。

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They usually have training programs of various kinds scheduled on a quarterly or semi-annual basis, covering a wide range of topics.

每一季度或半年都会有培训项目，包含各方面的知识。

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South Korean Defense Minister Kim Kwan-jin told a parliamentary committee in Seoul that the North has moved a medium-range missile to its East coast for an imminent test firing or military drill, according to the semi-official South Korean news agency Yonhap.

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According to UNESCO, a CLC is as a community-based non-formal educational institution or organisation which provides a range of services and learning opportunities to out-of-school children, youth and illiterate or semi-literate adults from socially disadvantaged rural and urban communities.

UNESCO: Community Learning Centres