1. The doorbell rang and Peggy ran fleetly to answer it, calling that it must be Santa Claus. 这时门铃响了，佩吉一边飞奔著去开门，一边叫著一定是圣诞老人。
2. Modeling language is used broadly nearly in all of fields in these years, it is an assurance of developing a system fleetly. 近年来建模语言得到广泛应用，已成为系统快速开发的有效工具。
3. Using the method can quicken the speed of building solid model bank and has actual significance to build complicated scene fleetly. 运用此方法可加快三维模型库的建立，对于复杂场景的快速搭建有实际意义。
