Lever
['liːvə] or ['lɛvɚ]
解釋/意思:
(noun.) a rigid bar pivoted about a fulcrum.
(noun.) a flat metal tumbler in a lever lock.
(noun.) a simple machine that gives a mechanical advantage when given a fulcrum.
整理:弗娜--From WordNet
解釋/意思:
(a.) More agreeable; more pleasing.
(adv.) Rather.
(n.) A rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied; -- used for transmitting and modifying force and motion. Specif., a bar of metal, wood, or other rigid substance, used to exert a pressure, or sustain a weight, at one point of its length, by receiving a force or power at a second, and turning at a third on a fixed point called a fulcrum. It is usually named as the first of the six mechanical powers, and is of three kinds, according as either the fulcrum F, the weight W, or the power P, respectively, is situated between the other two, as in the figures.
(n.) A bar, as a capstan bar, applied to a rotatory piece to turn it.
(n.) An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.
卡门錄入
解釋/意思:
adv. an obsolete comp. of lief.
n. a bar of metal or other substance turning on a support called the fulcrum or prop for imparting pressure or motion from a source of power to a resistance—of three kinds according to the relative positions of the power weight and fulcrum: (fig.) anything which exerts influence: any one of various tools on the principle defined above—in surgery dentistry &c.: a removable rod or bar inserted in a machine to be operated by hand leverage.—ns. Lē′verage the mechanical power gained by the use of the lever: advantage gained for any purpose; Lē′ver-watch a watch having a vibrating lever in the mechanism of the escapement.
編輯:纽曼
例句/造句/用法:
- But still the disappointed father held a strong lever; and Fred felt as if he were being banished with a malediction. 喬治·艾略特. 米德爾馬契.
- Bradley came to him, sitting on his wooden lever, and asked what o'clock it was? 查理斯·狄更斯. 我們共同的朋友.
- It might be 'sever,' or 'lever,' or 'never. 亞瑟·柯南·道爾. 福爾摩斯歸來記.
- By compressing or exhausting air through this tube it is obvious that the lever, N, will be raised or depressed, and the clockwork set going accordingly. 威廉K.大衛. 智者、化學家和偉大醫生的秘密.
- The lever and the pulley, lathe s, picks, saws, hammers, bronze operating-lances, sundials, water-clocks, the gnomon (a vertical pillar for determining the sun's altitude) were in use. 李貝. 西洋科學史.
- He discarded the original porte-rule and type of the transmitter for the key or lever, moved up and down by hand to complete or break the circuit. 魯伯特·薩金特·荷蘭. 歷史性發明.
- The relay coils are connected by wire to the spring piece, S, and the armature lever is connected to earth. 弗蘭克·路易斯·戴爾. 愛迪生的生平和發明.
- This had originally consisted of two levers, placed side by side. 魯伯特·薩金特·荷蘭. 歷史性發明.
- To stop the locomotive, the armature circuit was opened by the main switch, stopping the flow of current, and then brakes were applied by long levers. 弗蘭克·路易斯·戴爾. 愛迪生的生平和發明.
- Among these, are siphon pumps, the force pump of Ctesibius, a fire-pump, having two cylinders, and two pistons, valves, and levers. 威廉·亨利·杜利特. 世紀發明.
- I lay at full length along the deck with the levers and buttons of control before me. 愛德格·賴斯·巴勒斯. 火星戰神.
- Thus some very high wheels, with a small wheel in front, or one behind, wheels with levers in addition to the crank, etc. 威廉·亨利·杜利特. 世紀發明.
- The first organized typewriter in which separate key levers were provided for each type is a French invention. Edward W. Byrn. 十九世紀發明進展.
- The circular index plate _n_ had marked on it opposite the respective levers the letters and characters represented by said levers. Edward W. Byrn. 十九世紀發明進展.
安娜贝拉錄入