Lag of economic development的用法和樣例：
例句
- The academic circles often owe the sluggish development of agricultural insurance to the lack of governmental support.
對於我國農業保險發展滯后的原因學術界多歸於政府支持不力。 - As the network education development, the network courseware also obtained fast development, but network courseware estimation development is lag behina.
隨著網路教育的發展，網路課件也得到了快速的發展，但網路課件評價發展滯后。
