This is rare both in China and the world.

Those who can speak good English are quite rare while those who both speak good English and sing good songs are the rarity of rarity.

Passengers from Greece, where peanut allergy is rather rare, might have been more concerned about the melon in the fruit salad.

Smiles were not rare in our home and that' s how I wish to remember them.

There is, however, another kind, by no means uncommon, in which one person sucks the vitality of the other, one receives what the other gives, but gives almost nothing in return.