Mr Brown's error may be still graver.

布朗先生的错误可能更严重。

The graver the loss, the dryer the tears.

损失越重，泪水越干；

Outside America, the consequences could be even graver.

美国之外，后果可能会更严重。

There are other and much graver aspects of this question.

这个问题还有其他一些严重得多的方面。

The situation is graver than you can possibly imagine, Cissy!

情况比你想象的严重得多，西茜！