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汉语拼音：wǎng fù

1.来回；反复：～运动。循环～。

2.往来；来往：宾主～。

1. 来回；往返。

   唐 韩愈 《孔公墓志铭》：“海道以年计往復，何月之拘？”《明史·项忠传》：“今秋深草寒，若更调他军，恐往復需时，贼得远遁。” 清 蒲松龄 《聊斋志异·局诈》：“五更携眷去，不知何作，言往復可三日耳。”

2. 往而复来，循环不息。

   晋 郭璞 《江赋》：“呼吸万里，吐纳灵潮，自然往復，或夕或朝。” 唐 黄滔 《融结为河岳赋》：“星辰昼夜以明灭，乌兔东西而往復。” 清 赵翼 《瓯北诗话·吴梅村诗四》：“此等处，关棙一转，别有往復迴环之妙。”

3. 犹进退。

   《素问·六微旨大论》：“故气有往復，用有迟速。” 张介宾 注：“气有往復，进退。”

• The constant reversal of the piston travel sets up inertia forces, which increase Both with the weight of the piston and with its speed.

  活塞的不断往复运动产生了惯性力，惯性力随活塞的重量及其速度的增加而增大。

• The evolution of ancient spiritual civilization did not go through a straight line, but rather went through a gradual and flexuous process.

  上古精神文明的演进历程并非直线上升式的，而是一个曲折往复的缓慢渐进的过程。

• Assets were bundled into a pool, securitised, stuffed into a CDO, bits of that plugged into the next CDO and so on and on.

  资产被组合成池，进行证券化操作，进而被塞进CDO，其中一些还会被投入下一个CDO，并如此往复再往复。

• Coatings have been used to a limited extent, primarily in specialized applications, such as the plungers in reciprocating pumps.

  涂层的应用范围有限，最初是被应用在特殊领域，如往复泵的活塞。

• When a pencil is sharpened, the pencil needs to be contacted with the cutting edge and broached back and forth along the guiding groove.

  削笔时只要将笔贴在刀刃上，沿导向槽往复拉削即可。

• Pick up the CR13VBY and it appears to be a conventional reciprocating saw. But, pull the trigger and there is nothing conventional about it.

  所推出的CR13VBY带有传统往复式锯的特点，但是，拉动扳机之后就与传统的一点都不一样。

• The present invention is the combination of the principles of a reciprocating piston engine and a revolving cylinder type compressor.

  本发明是往复式活塞机与转缸式压缩机原理的结合。

• Mobile cathode: the mechanical device makes the plated with its poles together as a product of the periodic reciprocating motion cathode.

  移动阴极：采用机械装置使被镀制件与极杠一起作周期性往复运动的阴极。

• The rotating-reciprocating mechanism can directly move a plane display directly to produce a three-dimensional image.

  旋转往复机构可直接移动一平面显示器产生立体三维图像。