The mattress and base are normally bought as a set.

床垫和床基通常成套购买。

《柯林斯英汉双解大词典》

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Step 17. Creating the necessary directories and base files.

第17步：创建必需的目录和基础文件。

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President Mahmoud Ahmadinejad announced the launch to a crowd in Semnan province, his birthplace and a base for missile launches.

VOA: special.2009.05.23

You know, you mix acid and base together and the thing heats up like crazy, right.

你知道，当你把酸和碱混合起来时,这东西会像疯了一样地变热。

麻省理工公开课 - 热力学与动力学课程节选

Having done that, it goes back up and picks the second sub-list, which came from there. It's a down to base case, merges it.

就是从那里得来的,完成这些后,回到上一步。

麻省理工公开课 - 计算机科学及编程导论课程节选

So were the paths between the plate and first base, and third base and home.

NPR: Dbacks, Rangers Postponed By Unplayable Field

In South Dakota, mobiles, portables, and base stations can talk anywhere in our state.

FORBES: Connect

We create metrics and base goals and objectives on those data points where we have visibility.

FORBES: Technology Changes Everything