借此机会 应该忌讳僵硬的汉英对照,少要用chance opportunity等,要符合native speaker 的习惯
on this occasion,i will show my gratitude to your support
2 they walked into the room,talking and laughing 边说边笑后置,表状态
3 you could recongnize tourism as a means of protecting environment
4,by extensive reading,you will become encyclopedic