The task was more arduous than he had calculated.

　　這項任務比他所估計的要艱巨得多。

　　She undertook the arduous task of monitoring the elections.

　　她承擔了監督選舉的艱巨任務。

　　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.

　　任務艱巨，同時時間又很緊迫。

　　This is a hard job.; The task is arduous.

　　這個任務很吃重。