The task was more arduous than he had calculated.
這項任務比他所估計的要艱鉅得多。
She undertook the arduous task of monitoring the elections.
她承擔了監督選舉的.艱鉅任務。
All the 6 adventurers survived the arduous journey through the desert.
6名探險家都完成了穿越沙漠的艱難旅程。
The task is arduous; besides, there's not much time.
任務艱鉅，同時時間又很緊迫。
This is a hard job.; The task is arduous.
這個任務很吃重。