This is a dimensionless number because it's length divided by length.
这儿没有量纲，因为是长度除以长度。
And so this dimensionless number is very transparent, and we will show you some examples.
这个无因次数,很清楚,我将举几个例子。
And so this dimensionless number is very transparent, and we will show you some examples.
这个无因次数,很清楚,我将举几个例子。
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