同步覆盖：在单元测试中极力推荐测量代码覆盖，但是在测试并行程序时使用它，代码覆盖容易产生误导。
Synchronization coverage: Measuring code coverage is a highly recommended practice in unit testing, but when it comes to concurrent programs, code coverage is misleading.
网站针对全球的目的地生成许多条推荐线路，并允许用户根据自己的旅行天数以及希望参观的景点，对自己的行程表进行定制。
The site generates suggested itineraries for destinations around the world, and allows users to customise their schedules according to how many days they are visiting, and what they want to see.
利奥：我可以向您推荐五星级旅行团行程。
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