Identifying and tracking the changes made by multiple developers and merging them into a single, up-to-date codebase makes collaborative, multi-developer projects possible.

识别和跟踪多位开发人员所做的更改并把它们合并在最新的单一代码库中，这样就能够实现协作性的多开发人员项目。

youdao

And he had more Top Twenty single records than any other recording artist up to that time.

VOA: special.2010.05.16

So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.

比如，在这下面我写的是氮分子2,而这个是氢分子，但我在上面把这些分子的形式改写了，大家可以看到,这是一个氢与氢之间的单键，含一个氮与氮之间的三键。

麻省理工公开课 - 化学原理课程节选

Where, you know, you might have a single family that is using up 2 or 3 stories of the same apartment.

一个家庭也许会用上同一幢公寓的二三层楼。

上东区的房子 - SpeakingMax英语口语达人

Andrew Brown sacrificed and Baxter followed by grounding a single up the middle, easily scoring Byrd.

WSJ: Mets catch up to McCutchen, beat Pirates 3-2

With two outs, Lee hit a sharp single up the middle to score Mayberry.

WSJ: Gee tagged for 3 HRs, Phillies beat Mets 8-3

Anthony Rizzo grounded a single up the middle, the ball bounding into center to score two more runs.

NPR: Strasburg Drops To 1-5 As Cubs Beat Nationals 8-2