这些士兵在战场上经历了无数艰难困苦。

The soldiers faced countless ___hardships on the battlefield.

许多移民在适应新国家时经历了巨大的艰辛。

Many immigrants experienced great ___hardships while adapting to a new country.

尽管面临许多困难，他仍然坚持完成了学业。

Despite facing many ___hardships, he persevered and finished his education.