The adjustment method of feed aperture position in radar antenna and location mode of the feed aperture are analysed by taking two kinds of radar antenna as example in this paper.

以两种雷达天线为例，对天线馈源口面位置的调整方法和口面的定位方式作了分析，提出设计与制造中需要注意的有关问题。

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The two works are similar in theme, lyricism in style and low emotion, and they are different in the position of narration, narrative mode and the meaning of the work.

这两部作品在小说主题、叙事风格的抒情化、情感的低沉性方面有相同之处，在叙述立场、叙事模式与作品内蕴上又存在着不同之处。

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For a single mode light, two dimensionless quadrature operators are defined which are proportional to the usual position and momentum operators respectively.

对于一单模光场，定义两个无量纲的正交振幅算符，它们分别与坐标和动量算符成正比。

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