stand in for sb	substitute someone temporarily
it is common knowledge that	wiadomo ze
to the best of my knowledge	o ile mi wiadomo
hindrance	przeszkoda
be more of a hindrance than a help	być bardziej przeszkoda niz pomoca
prior to	before
market for	rynek dla np zbytu
opposition to	strong disagreement with, or protest against,
express sb disapproval of	wyrazić brak poparcia dla