At some point each developer must check his or her code into the source control system to see whether it will work with all the code others have written and checked in.

在某一时刻，每个开发人员都必须将他的或她的的代码检入到源控制系统中，以考察这些代码是否能和其他人编写并提交的代码一起工作。

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It must have the federal screeners in place by November 19 and must screen all passenger checked baggage by December 31.

CNN: Agency wants $4B more for airport screeners

Indeed, since it was ringed as an adult, and Manx shearwaters take four years to reach that exulted status, it must have been significantly over half a century old when researchers at the Copeland Bird Observatory in Northern Ireland checked its bona fides.

ECONOMIST: The oldest bird in the world