When you can log on to a map of gene expression from anywhere in the world, more people can enter the scientific conversation.
当你能从世界任何一个地方登录上基因表达图时，更多的人就能参与到科学讨论中来。
Click add to add the XPath expression to the list of expressions used by this map.
单击add将XPath表达式添加到此映射使用的表达式列表。
The call to map walks through each value, aliases it to v: val, evaluates the expression in the string, and replaces the value with the result of that expression.
调用map可以遍历各个值，将其作为别名赋给v： val，在字符串中计算表达式，并用表达式结果替换值。
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