多接口的缺点是，它招致了静态类型安全性的损失，因为接口只在运行时被选择，这使得系统更容易受到潜伏错误的伤害，即那些逃过测试的错误。

On the downside, multiple interfaces incur a loss of static type safety because interfaces are selected only at runtime, which makes the system more vulnerable to latent bugs that can escape testing.

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EasyMock框架的一个主要缺点是不能模拟具体类——而只能模拟接口。

One major disadvantage of the EasyMock framework is that you can't mock concrete classes - only interfaces.

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第一个缺点在于，与使用接口的API不同，抓取在内容提供者和内容消费者之间没有明确的联系。

The first is that, unlike APIs with interfaces, scraping has no specific programmatic contract between content-provider and content-consumer.

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