单词：wheel-fixed axis system
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UNIT12 Confucius 孔子(中国古代教育家、 儒家创始人) Anton Makarenko 安东马卡连柯 (前苏联著名教育学家) Anne Sullivan 安妮萨利文 (海伦凯勒的老师) load n.负荷;负载 workload n.工作负担;工作量 strict adj.严厉的;严格的 compulsory adj.义务的;有责任的; 必须
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axis, ['ksis] n 轴（虚构之线，如地轴，坐标轴） 【记】i象虚线－虚轴
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