网友回答：
biology， you will see beautiful sceneries typical of the region. besides， having worked hard throughout the weekdays， spending an annual holiday travelling abroad is an especially satisfying experience for those who do not have much of an opportunity to
温馨提醒：随时光变迁，文中所陈述观点；准确性、难免有所变动，因此文中观点仅供参考。
