adj.未開(kāi)發(fā)的；不發(fā)達(dá)的；未充分發(fā)育的

There are many undeveloped countries in Africa. 在非洲有許多不發(fā)達(dá)國(guó)家。

Starvation is a big problem in undeveloped countries. 饑餓在不發(fā)達(dá)國(guó)家是個(gè)很?chē)?yán)重的問(wèn)題。

The conception of the picture is undeveloped. 這幅畫(huà)的構(gòu)思不成熟。