Users have come to expect some form of rectangular shape, and when quickly scanning a page, it may take longer to distinguish button from decoration, and even become frustrating.
用户期望看到某种形式的矩形按钮，这样可以快速扫视文字页面。文字叠加需要花费用户更多的时间来辨认按钮，甚至可能造成用户的困惑。
The X ray diffraction and scanning electron microscope analyses show that the product possesses crystal structure, and the crystallized grain is rectangular and fusiform.
射线衍射和电镜扫描分析表明碳酸稀土产品属晶型结构，为长方体和纺锤形状结晶。
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