Lever

(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

• But still the disappointed father held a strong lever; and Fred felt as if he were being banished with a malediction. 乔治·艾略特. 米德尔马契.
• Bradley came to him, sitting on his wooden lever, and asked what o'clock it was? 查尔斯·狄更斯. 我们共同的朋友.
• It might be 'sever,' or 'lever,' or 'never. 阿瑟·柯南·道尔. 福尔摩斯归来记.
• 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.戴维. 智者、化学家和伟大医生的秘密.
• 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. 李贝. 西洋科学史.
• 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. 鲁伯特·萨金特·荷兰. 历史性发明.
• The relay coils are connected by wire to the spring piece, S, and the armature lever is connected to earth. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• This had originally consisted of two levers, placed side by side. 鲁伯特·萨金特·荷兰. 历史性发明.
• 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. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• 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. 世纪发明.
• I lay at full length along the deck with the levers and buttons of control before me. 埃德加·赖斯·巴勒斯. 火星战神.
• 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. 世纪发明.
• The first organized typewriter in which separate key levers were provided for each type is a French invention. Edward W. Byrn. 十九世纪发明进展.
• The circular index plate _n_ had marked on it opposite the respective levers the letters and characters represented by said levers. Edward W. Byrn. 十九世纪发明进展.

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