Indeed, one of the reasons behind the 2022 date for "recommendation" status is the need to write full test suites.

的确，2022这个到达“建议”状态的日期背后的其中一个原因就是需要编写完全测试包。

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Just when you think you're up to date with a technology or tool, a new version or new product gets released, and you're behind the curve again.

就在你觉得你已经掌握了一种技术或工具的最新情况时，一个新的版本或产品发布了，你又落后了。

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Rachel and Phoebe find a cell phone left behind by a cute guy, and wait for him to call so they can make a date with him.

瑞秋和菲比拾到一个可爱男生的手机，守株待兔等人家打电话过来，好同人家约会。

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But Mugabe refuses to set a date for his own exit, or to throw his weight clearly behind a successor.

NPR: Report Describes a Zimbabwe in Crisis

If they don't keep up to date, the business will get left behind.

BBC: NEWS | Programmes | Working Lunch | Lunch Lesson 12 - Apprenticeships

Year-to-date, however, FXI is still behind the eight ball, underperforming the MSCI EM by 3 percentage points.

FORBES: China Will Meet Official GDP Target