In micrographics a device for holding a frame, or frames, of microfilm.在缩微图形技术中,用于固定一帧或多帧缩微胶片的装置.In micrographics, a device that enlarges microimages for viewing.在缩微照相技术中, 放大图形以便观察的一种设备....
Sewage nutrients do increase algal growth in the harbour.污水中的营养物确实会加快港口的海藻生长。Non-fat dairy products supply the needed nutrients without excessive calories.脱脂乳制品能提供身体所需的营养,而不含过多的热量。Nutrients from the digested food can be ...