The surface morphology after preferential corrosion along the vertical orientation was observed via an optical microscope.
用光学显微镜观测和分析电火花线切割硅表面沿纵向分层择优腐蚀后的形貌；
The coverage of BeO on the specimen surface came from the preferential oxidation of beryllium due to the occurrence of residual oxygen in the vacuum system.
氧化铍在表面的覆盖来源于真空中残余氧气在样品表面的化学吸附，从而导致了铍的择优氧化。
By adjusting parameters, the films with (111) preferential growth have been successfully obtained at a low temperature.
通过控制参数，在较低的衬底温度下成功获得出(111)择优取向的纳米薄膜。
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