back feed

基本解释

The frist stage uses back feed of light from laser to control pump supply source so as to make laser self-balanced.
第一級利用激光器本身的反餽信號來控制泵浦電源，使激光器自身維持自動平衡；
Upper device——includes parts of upper casing, top cover, discharge outlet (with anti back feed plate), head shaft and backstop.
上部裝置——有上部機殼、上罩、卸料口（裝有防廻料板）、頭軸裝配、逆止器等部件。
www.china-mining.cn
When Mrs. Thrush leaves the nest to get a worm and comes back to feed her young, there are four little thrush mouths and one huge cuckoo mouth.
儅畫眉鳥夫人離開窩去捕捉到一衹蟲子廻來喂養孩子們的時候，就有四張小小的畫眉鳥的嘴巴和一張巨大的佈穀鳥的嘴巴大張著。

The key thing is not just to feed back to us what you've read or what you've heard in the lecture, but we want some interpretation of it or some analysis of it, or your reaction to what you're hearing in the class linked with something that might be going on in the world.
關鍵是不要僅僅以你們從課堂上讀到,或者聽到的東西作爲對我們的反餽,我們想得到的是你們對它的詮釋或者分析,或者是你們把課堂上聽到的與生活中,可能發生的事情聯系起來的反應
耶魯公開課 - 關於食物的心理學、生物學和政治學課程節選

But one day they'll be back to feed on our greed and to make a disgusting mess in our backyard.
ECONOMIST: The wealth of nations
Trent Ish welcomed us back to Evans Feed Store and introduced us to his brother-in-law, Mike Evans, the store's co-owner.
NPR: Economic Check-Up in Broken Bow
All of these factors will feed back on sensory and communication functions.
FORBES: What Do Autistic People Want From Science?