这个表达式选择元素的子元素之间的所有文本节点。
This expression selects all text nodes between the children of the element.
例如，正则表达式a (B (C))包含子组(B (C))和(C)。
For example the regular expression a (b (C)) has the subgroups (b (C)) and (C).
在这个例子中的每个正规表达式都是测试字符串的子串之一。
Each regular expression in this example is a substring of one of the test strings.
“有其父必有其子(likefather,likeson)”可能是最为常见的关于父亲的表达。
"Like father, like son" is probably the most common father expression.
启动子是基因表达调控的重要元件。
创建一个与此表达式类似的新表达式，但使用所提供的子级。
UpdateCreates a new expression that is like this one, but using the supplied children.
返回正则表达式搜索中第一个子字符串匹配项的位置。
Returns the position of the first substring match in a regular expression search.
如果所有子级都相同，则将返回此表达式。
If all of the children are the same, it will return this expression.
9爸爸，您总是用最平淡最朴素方式去表达您的爱，但您的爱却足够我享用一辈子。
9 dad, you always use the most plain and simple way to express your love, but your love is enough for me to enjoy a lifetime.
讨论了子空间上一类矩阵反问题，得到了问题有解的充分必要条件及解的表达式。
In this paper, a class of inverse problem for matrices on subspace is studied.
讨论了子空间上一类矩阵反问题，得到了问题有解的充分必要条件及解的表达式。
In this paper, a class of inverse problem for matrices on subspace is studied.
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