They are filing the teeth of a saw.
他们正在用锉子锉锯齿。
The act or an instance of using a file.
锉用锉刀锉的行为或事例
To smooth, reduce, or remove with or as if with a file.
锉平，锉除用或似乎用锉磨平、缩少或除去
To file or scrape with a coarse file having sharp projections.
粗锉用粗糙的锉子擦，锉或刮，发出刺耳的声音
You have to file away for hours to get this metal smooth.
你得锉好几个小时才能锉平这块金属。
I'd better file them for you. Come over here.
最好我来帮你锉一锉，过来这里。”
file ,hand-operated (excl. dental or manicuring files and interchangeable tool pieces)
手动锉（不包括牙锉或指甲锉及可互换的工具部件）
rotary file assortment set
成套圆头尖头旋转锉
a coarse file with sharp pointed projections.
有尖端的粗糙的锉刀。
power-operated file, non-electric, hand-held
手持式机动锉刀,非电动
lightening file
顶角为108°的三角锉
He filed an iron rod in two.
他把一根铁棒锉成两截。
He fed the surface down until it was flat.
他把这个表面锉平。
Time is a file that wears and makes no noise.
光阴如锉，细磨无声。
The end of the bar had been filed down to a point
铁杆的末端被锉成尖状。
A harsh, grating sound.
锉声尖利，擦刮般的声音
He filed away at the metal bar.
他不停地锉着金属棒。
a small flat file for shaping the nails.
用来修指甲的小的扁锉。