reach the bottom at

If they visited long ago, perhaps they left behind something in a difficult-to-reach spot, such as at the bottom of the ocean.

如果他们很久以前来过，也许在难以到达的地方留下了什么东西，比如在海底。

Harder words are more like items at the bottom of a box-we must rifle through the items we use more often to reach the buried rarity.

越难的单词就越像压箱底的东西——我们必须翻出那些常用的物什才能找到被埋藏的珍品。

When a particular language is entered into a box on the ad signup form, the approximate reach of the selection will appear at the bottom.

在广告注册表格中，选择某个特定语言后，在表格底部马上显示接收人数。