| 单词 | pump |
| 释义 | Word Frequency pump 1(pʌmp) noun 1. any device for compressing, driving, raising, or reducing the pressure of a fluid, esp by means of a piston or set of rotating impellers 2. biology a mechanism for the active transport of ions, such as protons, calcium ions, and sodium ions, across cell membranes a sodium pump verb 3. (when tr, usually foll by from, out, into, away, etc) to raise or drive (air, liquid, etc, esp into or from something) with a pump or similardevice 4. (tr; usually foll by in or into) to supply in large amounts to pump capital into a project 5. (transitive) to deliver (shots, bullets, etc) repeatedly with great force 6. to operate (something, esp a handle or lever) in the manner of a pump or (of something) to work in this way to pump the pedals of a bicycle 7. (transitive) to obtain (information) from (a person) by persistent questioning 8. (intr; usually foll by from or out of) (of liquids) to flow freely in large spurts oil pumped from the fissure Word origin C15: from Middle Dutch pumpe pipe, probably from Spanish bomba, of imitative originWord Frequency pump 2(pʌmp) noun 1. a low-cut low-heeled shoe without fastenings, worn esp for dancing 2. a type of shoe with a rubber sole, used in games such as tennis; plimsoll Word origin C16: of unknown origin |
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