您要查找的是不是:
- 笔pencil
- 摩擦friction
- 一笔trait
- 笔型pen type
- 笔友pen pal
- 摩擦片friction plate
- 大笔pen
- 贸易摩擦trade friction; trade conflict
- 笔钱fund
- 摩擦的frictional
- 记号笔marker pen
- 摩擦学tribology
- 录音笔recording pen
- 摩擦起电triboelectrification
- 一笔钱a sum of money
- 荧光笔nite writer pen
- 摩擦声grating
- 一大笔钱pretty penny
- 火柴由摩擦而生火。Matches are lighted by friction.
- 眼线笔eye-liner pencil