| 释义 |
- 造影剂：一种用于放射学检查（如X光、CT扫描、MRI等）的特殊物质，可以帮助医生更清晰地观察身体内部结构和功能。
- n.
1 a substance that is opaque to x-rays; when administered it allows a radiologist to examine the organ or tissue it fills 同义词：contrast medium
- 1
If, by contrast, everything was in a pile on the main floor, it would significantly reduce the usefulness of the library by making the search for materials virtually impossible. 如果采用相反的方式，将所有的东西都堆在一个大房间里，由于几乎不能进行资料搜索，因此会大幅度降低图书馆的有用性。 - 2
By contrast, photovoltaic solar power systems, mostly used on home rooftops, let light interact directly with semiconductor materials to generate power. 安装在住宅屋顶的太阳能光伏系统则与其相反，它让光线直接照射半导体材料以产生动力。 - 3
Natural use materials that contrast the color and/or texture of the signaling area (rocks, brush, branches, stomped grass). 信号区域中颜色、纹理差异较大的材料（岩石，树林，树枝，践踏过的草地等）
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