underlying economy好像应该是指股票市场相对的经济，美国股市相对美国经济，中国股市相对中国经济的意思，这里意思是说如果是在美国，估价和历史趋势以及相对应的经济形势不符合的时候，通常是人们担心所在。
valuations that seem out of step with historical trends (and, in America, the underlying economy) are usually ones to worry about.
这个术语的意思是指几乎所有的治疗，都会有的一些属性，我这里列出两个，其中一个是“支持。”
And what this just is a term meaning properties that all therapies or virtually all therapies, share and I've listed two of them here One of them is "support."
这里的实际的意思是指超越种种可能性的应当表现。
It is the action that, out of the various possibilities, I ought to perform.
这里匹配的意思是指牌花色或点数相同。
是对象的意思，这里指的是字符串类string，然后“item”是指你试图赋值的字符串中的字符。
The "object" in this case is the string and the "item" is the character you tried to assign.
摘要：这里提到的“黑白”有两层意思，一是指颜色，二是指对比。
Abstract: the reference mentioned here to "black and white" has a two-tier meanings. One refers to the color, the other is the contrast.
这里提到的“口角”有两层意思，一是指颜色，二是指对比。
The reference mentioned here to "black and white" has a two-tier meanings. One refers to the color, the other is the contrast.
这里的特殊含义有两层意思：第一层意思是指它表达的是网络上特有的在某个时期内流行的虚拟事物和虚拟行为以及与电脑网络技术相关的事物；
The special meanings have two connotations: the first means the unique virtual things and virtual behaviors during a certain period and the things relative to network technology;
这里的特殊含义有两层意思：第一层意思是指它表达的是网络上特有的在某个时期内流行的虚拟事物和虚拟行为以及与电脑网络技术相关的事物；
The special meanings have two connotations: the first means the unique virtual things and virtual behaviors during a certain period and the things relative to network technology;
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