The next installment in this series will cover more advanced topics, such as metaclass syntax, ABCs, decorators, integer literal support, base types, and exceptions.

本系列的下一期文章将会涵盖更高级的主题，比如元类语法、a BC、修饰符、integer literal支持、基类型和异常。

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The activities do not only cover teaching and research, but include new and diverse forms of teaching of a changing customer base (from teaching to lifelong learning).

这些活动不仅包括教学和研究，而且还有为适应不断变化的客户所采取的新的教学形式（从教学到终身学习的转变）。

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After getting burned once or twice for failing to cover some base, they develop a fool-proof routine to prevent that from happening again, then swear their eternal allegiance to it.

在某些地方上闯过一两次祸之后，他们就会制定出一个易于执行的例程去防止类似事件再次发生，然后发誓会永远拥护它。

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Tent cities cover the grounds of this sprawling army base in Virginia.

VOA: standard.2010.07.31

But for that strategy to work, each ETF needs to have a large asset base to cover its costs.

FORBES: Schwab ETFs Get Even Cheaper

The projects financed by these loans make fiscal sense as long as they add enough to the local tax base to cover their costs.

ECONOMIST: China's property market: Home truths | The

But each time some future Congress tries to raise the rate for contract protection, payers would have a natural inclination to band together and lobby to expand the base to cover more free-riders as an alternative.

FORBES: A Tax Both Ayn Rand And Ralph Nader Could Love