| 单词 | 来回摆动 |
| 释义 | 〔pendulum〕A body suspended from a fixed support so that it swings freely back and forth under the influence of gravity, commonly used to regulate various devices, especially clocks. Also called simple pendulum 摆：在一固定点悬垂的可在重力影响下自由来回摆动的摆体，通常用于调校钟等各种仪器 也作 simple pendulum〔pendulum〕Something that swings back and forth from one course, opinion, or condition to another:沿某一路线、想法或事态来回摆动的东西：〔waggle〕To move (an attached part, for example) with short, quick motions:来回摆动：用短而快的动作运动（如一个连接着的部位）：〔oscillate〕The rather dry wordoscillate may become a bit less dry as we learn its story. It is possible that it goes back to the Latin wordōscillum, a diminutive ofōs, "mouth,” meaning "small mouth.” In a passage in theGeorgics, Virgil applies the word to a small mask of Bacchus hung from trees to move back and forth in the breeze.From this wordōscillum may have come another word ōscillum, meaning "something, such as a swing, that moves up and down or back and forth.”And thisōscillum was the source of the verb ōscillāre, "to ride in a swing,” and the noun (from the verb) ōscillātio, "the action of swinging or oscillating.” The words have given us, respectively, our verboscillate, first recorded in 1726, and our noun oscillation, first recorded in 1658. The next time one sees something oscillating,one might think of that small mask of Bacchus swinging from a pine tree in the Roman countryside.当我们了解了与oscillate 有关的传说时，这个较为枯燥的词就会变得不那么干巴巴的了。 此词可被追溯到一个拉丁词oscillum， 可简写成os， “嘴”，意为“小嘴”。 在农事诗集 的一节中， 维吉尔用这个词指挂在树上在微风中来回摆动的酒神巴克斯的小假面具。从oscillum 一词可以得出另一词 oscillum， 指“前后或上下摆动的某物，如秋千。”而这里的oscillum 便是意为“在秋千上摆动”的动词 oscillare 和意为“摆动或摇动的动作”的名词（从动词来） oscillatio 的词源。 从这些单词中分别得出了我们今天所用的动词oscillation （首次记录于1726年）和名词 oscillation （首次记录于1658年）。 以后若看见物体在摆动，就很可能会想起古罗马乡间一棵松树上摇来晃去的巴克斯的小假面具了〔rockshaft〕A shaft that oscillates or rocks upon its bearings but does not revolve.摇臂轴：一种在轴承上来回摆动或摇动但不绕转的轴〔sway〕To swing back and forth or to and fro.See Synonyms at swing 摇摆：前后或来回摆动 参见 swing〔vibrate〕To fluctuate or waver in making choices; vacillate.犹豫：选择时来回摆动；摆动〔wave〕To make a signal with an up-and-down or back-and-forth movement of the hand or an object held in the hand:挥手示意：以手或手中所持之物上下或来回摆动示意：〔seesaw〕To move back and forth or up and down.上下或来回摆动 |
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