knock

音標(biāo)發(fā)音

• 英式音標(biāo) [n?k]
• 美式音標(biāo) [nɑ?k]
• 國際音標(biāo) [n?k]
• 英式發(fā)音
• 美式發(fā)音

基本解釋

• vi. 敲；打；敲擊
• vt. 敲；打；敲擊；批評
• n. 敲；敲打；爆震聲

詞源解說

• 直接源自古英語的cnocian；最初源自古挪威語的knoka，意為打擊，打。

同根派生

• n性質(zhì)的同根詞

  knocker：門環(huán)；敲擊者；吹毛求疵的人。

• knock相關(guān)詞

用法辨析

n. (名詞)

• knock用作名詞的基本意思是“狠狠的一擊,打擊”,用于比喻可指“不幸,挫折,艱苦”,引申可指“敲擊聲,敲擊信號”。
• knock是抽象名詞,但卻可數(shù),可加不定冠詞修飾,也可用復(fù)數(shù)形式,表示復(fù)數(shù)概念。
• knock后接at〔to〕的介詞短語表示側(cè)重敲擊的對象; 接on的介詞短語側(cè)重敲擊的位置。

v. (動詞)

• knock的基本意思是用手、拳等硬物“敲打”,指出聲地、連續(xù)地猛擊,引申可指發(fā)出敲擊或爆裂的聲響。還可表示“批評”“數(shù)落”“非難”。
• knock可用作及物動詞,也可用作不及物動詞。用作及物動詞時,可接名詞或代詞賓語,也可接以形容詞充當(dāng)補足語的復(fù)合賓語?？捎糜诒粍咏Y(jié)構(gòu)。
• knock是瞬間動詞,如表示重復(fù)動作,須用進行體。

• knock使用方法
• knock詳細辨析

英漢例句

用作名詞 (n.)

• The hard knock made her cry.
  重重一擊把她打哭了。

用作動詞 (v.)

用作不及物動詞: S+～(+A)

• Please knock before entering.
  進來先敲門。

用作及物動詞: S+～+ n./pron.

• The children were knocking the bottom of the box.
  孩子們在敲箱子底。

用作賓補動詞: S+～+ n./pron. + adj.

• He knocked me flat with one punch.
  他一拳把我打倒。

• knock更多例句

詞組短語

用作名詞 (n.)

動詞+～

• get the knock 被解雇,遭到失敗
• hear a knock 聽到敲門聲
• receive a knock 受到挫折
• stand the knock 忍受指責(zé)
• take a knock 受到嚴(yán)重損失

形容詞+～

• gentle knock 輕輕的敲門聲

• knock更多詞組

英英字典

劍橋英英字典

• (MAKE NOISE) to repeatedly hit something, producing a noise
• (HIT) to hit, especially forcefully, and cause to move or fall
• (CRITICIZE) to criticize, especially unfairly
• (NOISE) a sudden short noise made when someone or something hits a surface
• (HIT) the act of something hard hitting a person or thing

柯林斯英英字典

• If you knock on something such as a door or window, you hit it, usually several times, to attract someone's attention.
• Knock is also a noun.
• knocking
• If you knock something, you touch or hit it roughly, especially so that it falls or moves.
• Knock is also a noun.
• To knock someone into a particular position or condition means to hit them very hard so that they fall over or become unconscious.
• To knock a particular quality or characteristic out of someone means to make them lose it.
• If you knock something or someone, you criticize them and say unpleasant things about them.
• If someone receives a knock, they have an unpleasant experience which prevents them from achieving something or which causes them to change their attitudes or plans.
• to knock someone or something into shape&rarrsee shape

• knock劍橋字典
• knock柯林斯字典

專業(yè)釋義

能源科學(xué)技術(shù)

• 爆震

  The results show that the knock frequency band of compound combustion is between 5 and 10 kHz.
  負荷和預(yù)混合燃料性質(zhì)對復(fù)合燃燒爆震頻率帶影響不大。

  交通運輸工程

• 爆震

  On this base, we designed the ECU hardware and software of the knock feedback controlling ignition system.
  分析了爆震以及爆震對發(fā)動機的影響,并在此基礎(chǔ)上實現(xiàn)了爆震反饋汽油機點火的電控單元的硬件與軟件的設(shè)計。

• 敲擊

物理學(xué)

• 敲擊術(shù)
• 爆震
• 敲擊聲