supposition

n. /ˌsʌpəˈzɪʃn/ C1

假定；推测

An idea that you think might be true without proof.

仙境例句

Her neck was so long that the Pigeon's supposition was simple: she must be a serpent.

她的脖子那么长，鸽子便推测：她一定是条蛇。