sharp knife-edge

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UK

A1 初級
n.名詞鋒利的刀刃
The sharp knife-edge glinted in the dim light of the kitchen.
n.名詞如履薄冰
The company was operating on a sharp knife-edge, with little room for error.
n.名詞激烈的競爭
In the world of professional sports, athletes live on a sharp knife-edge, where the smallest mistake can cost them everything.