This asks for a numeric comparison only and explicitly disregards non-numeric join matches.
这要求进行数值比较,并且显然不接受非数值连接匹配。
Note that numeric types obey the normal rules for numeric comparison: if two Numbers compare equal (e. g., 1 and 1.0), only one of them can be contained in a set.
注意,数值类型遵守数值比较的正常规则。即比较相等的两个数值型对象,只有一个能存在于集合中,例如,1和1.0。
Numeric methods and rich comparison methods may return this value if they do not implement the operation for the operands provided.
数值型方法和很多比较方法可能会返回该值,如果他们没有为所给的操作数实现相应的操作的话。
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