not necessarily

未必，不一定

nostalgia, nostalgic, nostalgically, nostril, nostrum, not, not a little, not as...as, not as...as..., not as/so...as, not at all, not but that, not care a thing about, not for anything, not have to do, not in the least, not just...but, not more than, not much of a, not nearly, not only ...but (also), not only...but, not only...but also, not so much...as, not so much...as..., not that..., not that...but that, not think much of, not to mention, not...any longer, not...any more than, not...at all, not...but..., notability, notable, notably, notary, notation, notch, notched,