單詞
ratchet
英 ['r?t??t]
美['r?t??t]
基本信息
- n. 棘輪；棘齒
- vt. 安裝棘輪于；松脫
暢通詞匯
詞態(tài)變化
復數(shù):?ratchets;
中文詞源
ratchet 防止倒轉(zhuǎn)的棘輪
來自法語 rochet,線軸，紡錘，詞源同 rock,rocket.引申詞義棘輪。插入字母 t,比較 bake,batch.
英文詞源
- ratchet
- ratchet: [17] Ratchet was originally acquired, in the form rochet, from French rochet. This was a diminutive form descended ultimately from Frankish *rokko ‘spool’, which is related to English rocket. The notion of having teeth, which is central to the idea of a ratchet, therefore appears to be historically secondary; it presumably arose from the addition of ‘teeth’ to a rotating ‘spool’ or ‘spindle’ in a machine. The change from rochet to ratchet, which began in the 18th century, may have been influenced by German ratsch ‘ratchet’.
=> rocket - ratchet (v.)
- 1852, from ratchet (n.). Transferred sense attested by 1977. Related: Ratcheted; ratcheting.
- ratchet (n.)
- 1650s, rochet, from French rochet "bobbin, spindle," from Italian rocchetto "spool, ratchet," diminutive of rocca "distaff," possibly from a Germanic source (compare Old High German rocko "distaff," Old Norse rokkr), from Proto-Germanic *rukka-, from PIE root *ruk- "fabric, spun yarn." Compare rocket (n.2). Current spelling in English dates from 1721, influenced by synonymous ratch, which perhaps is borrowed from German R?tsche "ratchet."
雙語例句
- 1. He fears inflation will ratchet up as the year ends.
- 他害怕通貨膨脹會在年終更加嚴重。
來自柯林斯例句
- 2. A ratchet mechanism transfers the thread from spool to bobbin.
- 一種棘齒裝置把線從線軸轉(zhuǎn)到梭心上。
來自柯林斯例句
- 3. The chair has a ratchet below it to adjust the height.
- 這把椅子下面有棘輪調(diào)整高度。
來自柯林斯例句
- 4. We're trying to ratchet down the administrative costs.
- 我們正在想法控制管理成本。
來自柯林斯例句
- 5. Obviously, the regular crimp wave provides a mechanism for short - range entanglement of the ratchet type.
- 雖然, 有規(guī)則的卷曲波紋能使纖維間短片段內(nèi)彼此糾纏接觸,產(chǎn)生棘輪式機械作用.
來自辭典例句
ratchet相關單詞