He did that with serene confidence because the project had comprehensive code coverage.

他在进行重构时信心满满，因为项目拥有广泛的代码覆盖率。

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Writing test cases against code naturally increases the collective confidence of a development team.

对一个开发团队而言，针对代码编写测试案例自然可以增加集体的信心。

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Confidence: When making changes to code, having the ability to verify that the application behaves and performs without any errors provides you confidence.

信心：当修改代码的时候，拥有验证你的程序能够没有任何错误的运转和执行的能力将给你提供良好的信心。

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"The final result will be a ... next-generation computer code which the public can have confidence in, " said professor Victor Ransom, who is also on the Purdue team.

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