Even so, Be that as it may, Admittedly..., but...

unique to, characteristic of, only possible in

Even

Exist only because of, Owe everything to, Be possible/ meaningful only with

Just, Merely, Simply, Only

through, via, after passing through

From birth; innate, In a traditional or long-standing way; as it has always been, With tears; tearfully

While doing something; in the meantime, Remaining; still as is, Since then; ever since

ultimate, extreme, utter

For (A), In the case of (A), From (A)'s point of view

things like, and so on, and this and that

To the (bitter) end, Stubbornly, Persistently

for the purpose of, in order to, to ensure

When, While, In spite of (the circumstances)

as much as, as many as, at least

to be ~ and ~, to be ~ as well as ~, both ~ and ~

doing two actions at the same time, doing A while doing B, simultaneous or contrastive actions

Just, Only, Merely

Whether it is X or Y, Be it X or Y, In either case, regardless of which

Once, Now that, As soon as