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.
第一级利用激光器本身的反馈信号来控制泵浦电源，使激光器自身维持自动平衡；
Upper device——includes parts of upper casing, top cover, discharge outlet (with anti back feed plate), head shaft and backstop.
上部装置——有上部机壳、上罩、卸料口（装有防回料板）、头轴装配、逆止器等部件。
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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.
当画眉鸟夫人离开窝去捕捉到一只虫子回来喂养孩子们的时候，就有四张小小的画眉鸟的嘴巴和一张巨大的布谷鸟的嘴巴大张着。

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.
关键是不要仅仅以你们从课堂上读到,或者听到的东西作为对我们的反馈,我们想得到的是你们对它的诠释或者分析,或者是你们把课堂上听到的与生活中,可能发生的事情联系起来的反应
耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But one day they'll be back to feed on our greed and to make a disgusting mess in our backyard.
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Trent Ish welcomed us back to Evans Feed Store and introduced us to his brother-in-law, Mike Evans, the store's co-owner.
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All of these factors will feed back on sensory and communication functions.
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