Building a base on the moon.

在月球上建造基地。

youdao

youdao

Help us build a base on the earth.

帮我们在地球上建立一个基地。

youdao

The shell dropped and exploded above Fort Sumter, a United States military base on an island in the harbor.

VOA: special.2009.08.13

They also found some stockpiles of the virus from the 1950s that they still had on an Army base in Maryland,I think.

政府也在马里兰军队驻地发现了,从十九世纪五十年代储存到现在的病毒

耶鲁公开课 - 生物医学工程探索课程节选

And then later on, I played pitcher, short stop, first base, outfield,

后来我打过投球手、游击手、一垒位置和外场，

会打棒球吗？ - SpeakingMax英语口语达人

Strasburg, backing up third base on the play, pumped his right fist to celebrate.

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

This will provide a technical base on which to prepare the various stages of the process.

UNESCO: Programme meetings | United Nations Educational, Scientific and Cultural Organization

Aspen has had less snow than normal this year, 24 inches of hard-packed base on mid-mountain.

CNN: Tragedy Strikes Again