求翻译：因此，氧化膜在ELID中起着重要的作用，氧化膜在磨削过程中保持恒定的值，方可得到高精度的加工表面，氧化膜的识别和表征就尤为重要。是什么意思？

Therefore, the oxide film in elid plays an important role to maintain a constant value, the oxide film in the grinding process, before the high-precision machined surface, the identification and characterization of the oxide film is particularly important.

Therefore, the oxide film ELID played an important role in oxide film in the grinding process maintains a constant value, and to receive high-precision machining, surface oxide film in the identification and characterization is even more important.

Therefore, the oxide film plays the vital role in ELID, the oxide film is maintaining the constant value in the grinding process, only then obtains the high accuracy processing surface, the oxide film recognition and the attribute especially is important.

Thus, oxide films play an important role in the ELID, oxide film maintains a constant value in the grinding process, parties can get high precision machining surface, identification and characterization of oxide film is particularly important.

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