Keep well and save every kind of art tools, materials and equipment.
妥善保管、节约使用各种美工工具、材料和设备。
These professional power tools cost more, but they are made with better technology and materials.
这些专业电动工具较昂贵，但都是好的技术和材料。
Tools and construction materials can fall down at a construction site.
建筑工具和材料有可能从建筑工地跌落。
Tools and construction materials can fall down at a construction site.
建筑工具和材料有可能从建筑工地跌落。
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