Lever

['liːvə] or ['lɛvɚ]

解释:

(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

解释:

(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.

卡门录入

解释:

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.

编辑:纽曼