backward development的用法和样例：
例句
- The academic circles often owe the sluggish development of agricultural insurance to the lack of governmental support.
对于我国农业保险发展滞后的原因学术界多归于政府支持不力。 - As the network education development, the network courseware also obtained fast development, but network courseware estimation development is lag behina.
随着网络教育的发展，网络课件也得到了快速的发展，但网络课件评价发展滞后。
