聚焦环;调焦环;调焦圈

focusing ring的用法和样例：

例句

The second version also has wider and deeper knurling on the focusing ring than the previous version.第二版调焦环上的棱比前一版更宽更深。

英语歌曲:Ring,Ring,Ring The Bells

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Wee Sing For Christmas

新视野大学英语视听说 Unit 9-6

IV. Speaking Out Focusing Attention Model 1 As far as Im concerned,

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新视野大学英语：视听说教程 1

英文儿童歌曲:Ring A Ring Of Roses

Ring A Ring Of Roses a ring of roses a pocket full of posies (hot-sha hat-sha all fall down)* ring a ring of roses a pocket full of posies (hot-sha hat-sha all fall down)* the king has sent his daughter to fetch a pail of water (hot-sha hat-sha all f

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怎样与老爸老妈讲话

You may just need help relating to your parents or you mainly talk to them something difficult. By the way,read on. Here's how: 1.Find time that you and your parents can be comfortable and relaxed together. 2.Make sure no one is focusing on something

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英语歌曲:Where Is The Ring?

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英语儿歌274首第176期:Ring,Ring,Ring the Bells

歌词如下： Ring,ring,ring the bells, Ring them loud and clear. To tell the children everywhere, That Christmastime is here. Ring,ring,ring the bells, Ring them loud and clear. To tell the children everywhere, That Christmastime is here.

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英语儿歌274首

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