Derived types must be completely substitutable for their base types.

派生类型必须是它们的基础类型完全可替换的。

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When testing a component, you can select substitutable elements as input to a component test.

在测试组件时，您可以选择可置换元素作为组件测试的输入。

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By contrast, volatility does not necessarily hurt consumers, because different food staples are often substitutable.

而价格波动，恰恰相反，不一定会损害消费者利益，因为不同的主食是可以互相替代的。

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The idea that natural assets are substitutable makes some environmentalists (including some contributors to the report) nervous.

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At the extremes to an economist everything is substitutable.

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The FDA has yet to pass judgement on the subject of substitutable or interchangeable biosimilars, but consensus indicates that such a status could be conferred on a biosimilar if it is supported with more extensive clinical testing.

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