另一种方法是契约式设计，这是阐明组件设计细节的一项切实可行的技术。
Another approach is design by Contract, a proven technique for clarifying component design details.
契约式设计比起单元测试有些优势，但是这两种方法是互补的。
Design by Contract has some advantages over unit testing, but the two methods are complementary.
契约式设计比起单元测试有些优势，但是这两种方法是互补的。
Design by Contract has some advantages over unit testing, but the two methods are complementary.
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