I will try to complete my job.
或I will try to do my job.
这里"份内的事",如果直译的话比较罗嗦,也不符合英文习惯.因此用do my job,或complete my job 就能够表示了.
我会努力,即 I will try my best to do sth. 或I will do my best to do sth.当然,因为是努力,而不是尽全力,所以根据语气,用try 就可以了,不用do my best.
I will strive to do their fair share of things
I will try to do well what I should do.