arduous task

• 任务艰巨

arduous task的用法和样例：

例句

1. It was a difficult task, but we accomplished it.
   虽然任务艰巨，可是我们完成了。
2. Qiqihar, as the final torch rods, day to pay more than it was an honor, and that the task is arduous.
   作为齐齐哈尔最后一棒火炬手，付天余既感到光荣，又觉得任务艰巨。