Preoxidation
预氧化
🗣️ 情景例句
My favorite type of exercise is ...
我最喜欢的锻炼方式是……。
He would direct the workman to use his plans.
他为了执行自己的计划，给员工下了指示。
These drawings on the wall are process sheets.
墙上的图表是工艺流程表。