那个昂贵的水晶玻璃杯有一个非常厚重的底座。

The expensive crystal glass had a very heavy ___base.

我们在悬崖底部发现了一些有趣的贝壳。

We found some interesting shells at the ___base of the cliff.

确保台灯的底座平稳地放在桌子上。

Make sure the lamp's ___base is sitting flat on the table.