- 自动: voluntarily; of one's own ac ...
- 笔: pen; pencil; stylus; writing ...
- 动笔: (用笔写或画, 多指开始写或画) take up the pen; start writing 勤思索, 多动笔 do some hard thinking as well as much writing; 想清楚了再动笔。 think it all out before you start writing
- 差动笔: differential pen
- 开始动笔写: start to write
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