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BNC: 24504 COCA: 21513
ratchet
rætʃɪt ˈrætʃɪt
Word forms: plural , 3rd person singular present tense ratchets, present participle ratcheting, past tense , past participle ratcheted
1 N-COUNT (防倒转的)棘齿,棘轮 In a tool or machine, a ratchet is a wheel or bar with sloping teeth, which can move only in one direction, because a piece of metal stops the teeth from moving backwards. (防倒转的)棘齿,棘轮
  • The chair has a ratchet below it to adjust the height.

    这把椅子下面有棘轮调整高度。

  • A ratchet mechanism transfers the thread from spool to bobbin.

    一种棘齿装置把线从线轴转到梭心上。

2 V-ERG (使)(工具或机器)发出嗒嗒声 If a tool or machine ratchets or if you ratchet it, it makes a clicking noise as it operates, because it has a ratchet in it. (使)(工具或机器)发出嗒嗒声
  • The rod bent double, the reel shrieked and ratcheted. [VERB]

    操作杆进一步弯曲,线轴发出刺耳的吱吱声。

  • She took up a sheet and ratcheted it into the typewriter. [VERB noun]

    她拿起一张纸,把它哗哗啦啦地塞到打字机中。

3 N-SING (形势的)每况愈下,恶化 If you describe a situation as a ratchet, you mean that it is bad and can only become worse. (形势的)每况愈下,恶化 [mainly British]
  • ...another raising of the ratchet of violence in the conflict.

    冲突中又一次的暴力升级

Phrasal verbs:
ratchet down ratchet up
Trends of ratchet
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BNC: 24504 COCA: 21513
BNC: 24504 COCA: 21513

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