"Musimy zrobić więcej badań."

Translation: We have to do more research.

[frandogk3]

"Researches" is not ok. There is no such word. There are searches, and researchers, but no researches.

[Jellei]

After more... research, it seems that you're right, deleted it.

[one_half_3544]

https://en.wiktionary.org/wiki/Talk:research =))

[Garry_S]

But "Oxford Learner's Dictionary" has a different opinion:
https://www.oxfordlearnersdictionaries.com/definition/english/research_1#research_inflg_4

[alik1989]

A term I often see on billboard ads in Poland meaning also 'medical examination'

[immery]

badanie:

1) praca wykonywana przez naukowca, której celem jest uzyskanie nowej wiedzy - work done by scientist which's purpose is to find new knowledge

2)a sprawdzenie stanu zdrowia pacjenta checking patient's state of health

2)b wynik sprawdzenia stanu zdrowia pacjenta result of checking patient's health

http://www.wsjp.pl/index.php?id_hasla=7681=0_szukaj=badanie

[Tassadar3]

Apparently "must" and "should" should be used interchangeably all over the course...

[Jellei]

"should" is not accepted in this sentence. Sometimes it really makes sense for "musieć" (hard to discuss without a specific example), but not here.

[JanuszWoro3]

What about "testing" and "experiments" as translations of "badań"?

[Jellei]

OK, let's say they're close enough.

[Mrs.Mop]

Really a doctor would say.. we must/need to do more tests.

[Jellei]

Depends on the context... but it could be a medical doctor, true. "tests" work.

The 'research' interpretation is probably coming from some scientist.

[techdeath]

Why does badanie decline like the feminine plural genitive ?

[Jellei]

It seems to me like the usual behavior of neuter singular nouns, their Genitive plural form usually ends with a consonant...

Also, you said "feminine plural", but the thing that people call sometimes "feminine plural" is actually a plural for all nouns that do not describe male people, so "badanie" is there as well.