for instance	for example - na przykład
valid	it means that it's accepted by the officials for eg documents - ważny
validity	ważność
at the cost of the supplier	the supplier covers the cost of the delivery - na koszt dostawcy
build up	is to create to establish - stworzyć
spring up	is to appear suddenly - pojawić się nagle
lack of experience	inexperience - brak doświadczenia
collapse	is to stop existing - upadek firmy, upadać, zawalać się
to be reluctant to sth	having no will to do sth - być opornym do czegoś
entrepreneur	is a person who has or runs a business - przedsiębiorca
interest rate	the percentage that a bank charges or pays clients -
upgrade	is to improve sth, to get a newer version - aktualizować, ustrawniać, modernizować
unleash the demand for sth	is to make that people want sth/the product - wywołać popyt na coś
take charge of sth	is to take control and become responsible for sth - przejąć dowodzenie/władzę nad czymś
commodity	sth that can be sold and bought - towar
repay	to give back sb or bank the money which someone borrowed - spłacać
marketer	a person or company which one introduces a new product or service