Filed
v. [专利]申请；存档（file的过去分词形式）
🗣️ 情景例句
to schedule one hour a week--to start with.
安排一星期一个小时。
Know something like the palm of one's hand.
熟知其事，了如指掌。
What do the farmers do with your machines?
农民用机器做什么呢？