chemical polishing的用法和样例：
例句
- The result concludes that the polishing solution is innocuous and harmless to the environment.
结果表明，经化学抛光后的铜及其合金表面光亮，达到镜面效果。 - After its angles have been beveled, guaranteeing a neat fit with the case, the sapphire crystal is chemically polished on both sides.
对镜面边缘进行斜削，以确保其与表壳的精确配合，再将两面进行化学抛光。
