此处的grit和determination如何翻译？

猪仔虫

Here I met a forester named Kotrangada Chinnappa, who had just begun to confront these pressures with uncommon grit and determination.

说一下上下文，有助于翻译：森里到处布满捕猎的陷阱，到处乱砍滥伐，毁林开荒等，然后接着就是上面的句子了。
难点在于with uncommon grit and determination这个宾语补足语怎么翻译，grit和determination如何翻译？