I was bringing up my three children as a single parent.

我当时作为一个单亲家长抚养着我的3个孩子。

《柯林斯英汉双解大词典》

First, move up three levels to the parent.

首先，将三个层次移动到父层次上。

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In most cases data must have three columns: Identifier, Name and Identifier of parent row.

在大多数情况下的数据必须有三列：标识，名称及家长行标识符。

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In most cases data must have three columns: Identifier, Name and Identifier of parent row.

在大多数情况下的数据必须有三列：标识，名称及家长行标识符。

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