ratchet
英 ['r?t??t]
美['r?t??t]
- n. 棘轮；棘齿
- vt. 安装棘轮于；松脱
畅通词汇
词态变化
复数:?ratchets;
中文词源
ratchet 防止倒转的棘轮
来自法语 rochet,线轴，纺锤，词源同 rock,rocket.引申词义棘轮。插入字母 t,比较 bake,batch.
英文词源
- 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."
双语例句
- 1. He fears inflation will ratchet up as the year ends.
- 他害怕通货膨胀会在年终更加严重。
来自柯林斯例句
- 2. 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。
来自柯林斯例句
- 3. The chair has a ratchet below it to adjust the height.
- 这把椅子下面有棘轮调整高度。
来自柯林斯例句
- 4. We're trying to ratchet down the administrative costs.
- 我们正在想法控制管理成本。
来自柯林斯例句
- 5. Obviously, the regular crimp wave provides a mechanism for short - range entanglement of the ratchet type.
- 虽然, 有规则的卷曲波纹能使纤维间短片段内彼此纠缠接触,产生棘轮式机械作用.
来自辞典例句