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is_valid: bool = true;Booleans are returned by comparison and logical operators:
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但真正值得玩味的不是融资数字本身，而是这些数字背后的面孔。
topFrame: null,
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Wonder seems to have fallen out of favor with sci-fi writers. I can't remember reading a recent book that gave me a sense of awe or grandeur. On the other hand, characterization and dialog are very much in favor (which is a good thing), I've read a lot of recent books with vivid characters and dialog.