沿海城镇附近有一个美国空军基地。

There is an American Air Force ___base located near the coastal town.

这个旧军事基地已被改造成一个公共公园。

The old military ___base has been transformed into a public park.

白天，你可以参观空军基地，它在9点开放。

During the day, you can visit the air force ___base, which opens at 9 o'clock.