w gruncie rzeczy Englisch:

For roughly the first month of life the immune system is switched off in essence and everything they [babies] get exposed to in that first month in life

The pattern is essentially the same in all cases.

It is essentially a question of time.

This means that it is essentially “ sodium-free”.

and has been said to be essentially anti-industrial

You may not like it but what he's saying is essentially €‹true.

I essentially support what has been said about her.

It's essentially a dictionary but it differs in one or two respects.

What he's saying is essentially true.

In general the relation between parents and children is essentially based on teaching.

Diamond is essentially hard.

We often hear it said that ours is essentially a tragic age.

Essentially it's a one-to-one match, but the content of that match is a level so high as to be unthinkable to an ordinary person.

Penis enlargement supplements, as sold on sites and in magazines, have essentially no effect.

I may be small, but as a matter of fact, I’m very strong.

Well, as a matter of fact, I am a little tired.