At the beginning和in the beginning区别： 1、at the beginning 常常跟of短语连用。 如：at the beginning of this century a great many europeans went to live in the usa. Be located on 强调垂直位置，位于物体或地点的表面或顶部。be located in 强调内部位置，位于物体或地点的内部或边界。be located at 强调具体位置，位于特定的位置或地方。 它们在. 电气图中ap、 al、 ale、 at、 aw各表示什么一、电气图中ap、al、ale、at、aw的含义1.
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At time和at times的区别为：意思不同、用法不同、侧重点不同。 一、意思不同 1.at time意思：当时。 2.at times意思：有时，间或。 二、用法不同 1.at time用法：意思是“当时，那时”“接着，.
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