1N-COUNT 苗床;苗圃 A seedbed is an area of ground, usually with specially prepared earth, where young plants are grown from seed. 苗床;苗圃
2N-COUNT (人或事物发展的)有利环境，温床 You can refer to a place or a situation as a seedbed when it seems likely that a particular type of thing or person will develop in that place or situation. (人或事物发展的)有利环境，温床
TV is using radio as a seedbed for ideas. [+ for/of]