Question

尽管这任务很坚难，我们还是设法按时完成了它英语翻译

用manage to do

Answer 1

您好！可以这样翻译：Although the work is difficult,we have managed to finish it on time at last.尽管这任务很坚难，我们还是设法按时完成了 劳驾您采纳一下，谢谢您的支持！

Answer 2

we managed to finish it on time though the project was hard to do.