困难用英文怎么说复数

"Difficulties" 是困难的复数形式。

来源：difficulty 是一个名词，其复数形式通常在词尾加上 -ies。

例句：

She faced many difficulties while trying to start her own business. (她在尝试创办自己的生意时面临了许多困难。)
The project was plagued by technical difficulties. (这个项目困扰着技术困难。)