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- 美国United States
- 隐藏光学仪器optical instruments
- 在地面上的观测,主要利用望远镜及光学仪器去记录太阳黑子的数目,而极光的观测则能提供地磁暴出现的证据。On the ground, telescopes and optical instruments are used to record the number of sun spots, as well as to observe aurora, which provide evidence of geomagnetic storms.
- 仪器(scientific, etc.) instrument
- 美国的stateside
- 在美国stateside
- (照相机、望远镜等的)镜头由两片或更多的透镜组成的联合体,有些还要加上其它的光学仪器,如棱镜,用来成像以便观看或摄影。A combination of two or more such pieces,sometimes with other optical devices such as prisms,used to form an image for viewing or photographing.
- 光学optics
- 美国人American person
- 美国总统Chief Executive
- 美国英语Americanese
- 仪器的instrumental
- 美国政府U.S. government
- 仪器仪表instruments and meters
- 光学显微镜light microscope
- 美国国会U.S. Congress
- 光学的optical
- 精密仪器precise instrument
- 仪器分析instrument analysis
- 美国梦the American dream