The long serrated knife is often called a bread knife because it is particularly good for slicing breads that require a back and forth sawing motion.

长齿刀经常被称为面包刀，因为人们在切面包时需要前后锯着切面包，长齿刀很适合这个工作。

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The serrated bread knife cuts with a sawing motion instead of a downward force, keeping your sandwich from getting smooshed.

FORBES: No. 1 The Knife