虽难有些累 Some tired but happy
虽然很难 Although it is difficult ; though it's difficult
虽然这很难 we make it harder than it has to be
虽然现在困难重重 Things may be difficult now
虽然多么难以 Though it's not easy
虽然它的困难 though it's difficult
虽然它是很难 THOUGH IT IS DIFFCULT
虽然这是困难的 Although this is difficult ; While this is a difficult
虽然是很难确切 though it is hardly exact
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