尽管条件艰苦，这位坚韧不拔的探险家依然坚持完成了穿越沙漠的挑战。

Despite harsh conditions, the ___gritty explorer persevered and completed the desert crossing challenge.

我的鞋子里进了一些沙粒，走路时感觉很不舒服。

There's some ___gritty sand in my shoes that makes walking uncomfortable.

这部纪录片展现了渔民艰苦生活的真实一面。

The documentary shows the ___gritty daily struggles of the fishermen.