It means, something you already have is twice as valuable to you as something you might be able to get. In other words, don't abandon something valuable you already have in the risky hopes of getting something better.
If something is biannual, it happens twice a year.
No. It is not a preposition. Twice is an adverb.
twice nice, twice precise
twice nice, fair pair, twice precise
to double something twice as much
Biannual or semiannual.
twice is a preposition who would ask that stupid question
57.3337499283736438% chance
It's possible, but not likely, to get chickenpox twice after getting chickenpox vaccine. Talk with your health care provider to find out how certain was the diagnosis.
the only combination which does not produce heads at least once it tails twice. the odds of getting tails twice is 0.5*0.5=0.25 so the odds for getting heads at least once is 1-0.25=0.75 or 75% or 3/4.
Biscuit, from the Old French 'bi' twice, 'cuit' cooked.