Three-knife trimmer: A guillotine designed with three knives for trimming sizeable stacks of books or magazines.

三刀切书机：设计用来裁切适量书本或杂志边缘的切纸机。

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With three multi-purpose knives, you can perform almost every cutting job; while other types have more specialized uses.

选择3种最常用的刀，他们几乎可以帮助你完成所有的切菜工作。 当然除此之外，还有另外一些专用刀具。

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According to the Wilson Center, Dr. Esfandiari was on her way to the airport on December 30th when three masked men with knives threatened to kill her and took her baggage and passports - both U.S. and Iranian.

NPR: Iran Detains Iranian-American Scholar

Folded pocket knives with blades of less than three inches in length and cartridge-style razor blades are not covered by the legislation.

BBC: NEWS | UK | England | Derbyshire | Shops warned over knife sales

Trading standards officers seized a haul of knives, including kitchen knives, craft knives and carving sets with blades ranging from three to eight inches long.

BBC: NEWS | UK | England | Derbyshire | Shops warned over knife sales