Translation of irremplazable

I am skipping sentences that are too long just to be sure. For example I just saw this one. Now, please copy this English sentence and place it exactly into a search browser tool. You will see that is has been copied.
If you go to the shopping mall to buy shoes, it takes an hour and two stores until you find the right pair of shoes. But if you go shopping 'stuff' generally, it might take you an entire day to finish.
I'm glad as well, thanks for the suggestions. I had little time last week as we had many important meetings. I beg your pardon. Let us continue later. Many greetings from Germany.