你用什么替代良心？不用说我也知：律师。——《侦探的故事》。
What do you get in place of a conscience? Don't answer. I know: a lawyer. — Detective Story.
那不是放弃这些不良习惯的理由。明白为什么这些不良习惯根深蒂固使得科学家了解到用良好的习惯替代不良习惯的方法。
That's not an excuse to give up. Understanding how unhealthy behaviors become ingrained has scientists learning some tricks that may help good habits replace the bad.
为什么用氮气替代二氧化碳？
为什么用氮气替代二氧化碳？
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