交通堵塞会产生额外开销和不可预测性，这让投资者望而却步。
Traffic jam leads to expense and unpredictability, things that keep investors away.
额外开销是由偶发复杂性形成的，直至它开始显示项目的实际获益。
That extra overhead is a form of accidental complexity until it starts showing actual benefits in your project.
在调整时，一定要考虑大型数据库的额外开销和进行全文搜索的频率。
When sizing, make sure you take into consideration the extra cost of large databases and frequency of full-text searches.
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