n. (pl. knives ) 1.小刀；餐刀；菜刀。 2.〔诗〕短刀，匕首。 3.【机械工程】(切断器的)刃部；(机器上的)刀具[刀片]。 4.〔 the knife〕 【外】手术刀。 短语和例子 a folding knife折刀。 a knife and fork (吃西餐用的)一副刀叉。 a pocket knife(可折合的)小刀。 a table knife餐刀。 before you can [could] say knife〔口语〕说时迟那时快；一眨眼；突然。 cut like a knife(风等)冷得刺骨。 get [have] a [one's] knife into sb. 对某人报复，猛烈攻击某人，同某人过不去。 go [pass] under the knife〔口语〕动外科手术，开刀。 have a horror of the knife 怕动外科手术。 play a good knife and fork 吃得津津有味；饱餐一顿。 sharpen one's knife for sb. 准备惩罚[攻击]某人。 That one could cut it with a knife…十分明显的，非常压抑的。 under the knife 〔口语〕动外科手术。 war to the knife 血战，鏖战。 vt. 1.拿小刀切；拿尖刀戳。 2.〔口语〕秘密打击，用阴险手段击败，背叛。 3.刀切似地穿过。 4.用括刀涂(颜料等)。 vi. (刀似地)劈开，穿过。
edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle
a weapon with a handle and blade with a sharp point
any long thin projection that is transient; "tongues of flame licked at the walls"; "rifles exploded quick knives of fire into the dark" 同义词：tongue,
use a knife on; "The victim was knifed to death" 同义词：stab,
A knife (plural knives) is a cutting tool with an exposed cutting edge or blade, hand-held or otherwise, with or without a handle. Knife-like tools were used at least two-and-a-half million years ago, as evidenced by the Oldowan tools.
例句与用法
1.
The handle of his hunting knife was neatly carved . 猎刀柄雕工精美。
2.
On the top of the gallows is fixed the knife . 绞架顶上装着一把刀。
3.
She put a knife between his ribs . 她举起一把刀子刺进了他的肋骨间。
4.
The knife gleamed wickedly in the moonlight . 那把刀在月光下闪着凶光。
5.
A terrible pain knifed his body . 一阵剧痛像刀割似地穿过他的身体。
6.
The thief was clasping a knife in his left hand . 盗贼左手握着一把刀。
7.
In the other hand he had our kitchen knife . 他另一支手拿着我们的菜刀。
8.
Put down that knife before you hurt somebody ! 把那刀子放下，以免伤人！
9.
You are welcome to the loan of my knife . 你可随意借用我的小刀。
10.
She told him the knives weren't sharp . 她告诉他，这些刀都太钝。
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