短語(yǔ)詞組短語(yǔ)advantage backwardness 後起者優(yōu)勢(shì)advantage of backwardness 後發(fā)優(yōu)勢(shì);優(yōu)勢(shì)the advantage of backwardness 落後得益;後發(fā)優(yōu)勢(shì);落後優(yōu)勢(shì) 返回 backwardness advantage