Effects of different dopants and sintering temperature on the morphology of alumina crystallites were observed in detail by using light scattering observation apparatus, SEM, EDX and XRD.

用光学显微镜、电子扫描显微镜、能谱及X射线衍射分析，比较详细地观察了各种掺杂物和温度对氧化铝晶体形貌的影响。

youdao

A discovery can be as simple as the observation of a previously unnoticed phenomenon, while an invention is a human-devised machine, tool, or apparatus that did not previously exist.

很多人都不清楚这个。发现也许是简单地观察到了前人未曾注意到的现象，而发明是设计了某种以前未曾有过的机器，工具或者设备。

youdao

This paper describes the electric and electronic apparatus of balloon borne telescope for far infrared observation of the sun.

本文介绍了一个用于观测太阳远红外辐射的球载望远镜电气设备。

youdao