The task was more arduous than he had calculated.

　　這項任務(wù)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(wù)。

　　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(wù)艱巨，同時(shí)時(shí)間又很緊迫。

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

　　這個(gè)任務(wù)很吃重。