1. But how big or small, form, color of varying backpack find their own, but it is not so easy. 然而如何在大大小小、形色各异的背包中找到适合自己的，却也不是那么容易的事情。
2. Selecting samples which can completely exhibit the varying characteristics of musical signal is the most important subject of this system. 如何选择一些能够完全表示出音乐讯号特性的样本是此系统一个很重要的议题。
3. The degree and range of possible impact of highway construction on the ecological environment is discussed, and the impact on loss of soil and water under varying regions and coverage is analyzed. 本文论述了公路建设施工期、运期对沿线生态环境可能产生的影响程度和范围，着重分析在不同地区、同覆盖率下对水土流失的影响。
