Definition
Without a doubt; certainly; definitely.
确实，百分之百
This is not his best work, to be sure, but it's still worth reading.
这不是他最好的作品，的确如此，但仍值得一读。
He is not the most qualified candidate, to be sure, but we should still give him a chance.
他并不是最有资格的候选人，的确如此，但我们仍应该给他一个机会。
The task is not easy, to be sure, but we are determined to complete it.
这个任务并不容易，的确如此，但我们决心完成它。