Their difficulties are increasing.是什么意思？

Their difficulties are increasing.

他们的困难越来越多。

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

difficulties

n. 困难( difficulty的名词复数 )，难度，难事，麻烦；

例句
As the sanctions begin to bite there will be more political difficulties ahead...
随着制裁开始产生严重的负面影响，政治上将面临更多的困难。

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

increasing

v. 增加，增大，增多( increase的现在分词 )，增强，增进，[缝纫]放（针），增强；

例句
His increasing alignment with the Reagan administration nearly cost him re-election.
与里根政府日益紧密的关系差点让他失去了连任的机会。