The main cutting tools aren't complex: paper and scissors or a knife, but clever and skilled paper-cutting artists can make very beautiful artworks.

剪纸的主要工具并不复杂：纸、剪刀或刀，但灵巧熟练的剪纸艺术家能剪出很美的艺术品。

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The main cutting tools are simple: paper and scissors or an engraving knife, but clever and deft craftspeople are remarkably good at cutting in the theme of daily life.

剪纸的主要工具很简单：纸和剪刀或刻刀，但心灵手巧的工匠非常善于在日常生活的主题切割。

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Knife is one of the important tools in the mankind's social activities and function. Its category is diverse, its form is complicated.

刀是在人类社会生活中起到重大作用的工具之一，种类繁杂，形制多样。

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Needle, knife, abacus, eyeglasses: These are my favorite tools when I think about humanity's origins and future.

FORBES: Magazine Article

The lathe, which is essential to make many of the more complex tools on the Forbes list, is a mechanism for rotating work to be shaped with a knife.

FORBES: Magazine Article