好词靓语
1．It is my honour to... 我很荣幸……
2．deliver a speech on 发表关于……的演讲
3．there is no doubt that... 毫无疑问……
4．excessive food waste 过多的食物浪费
5．pose a potential threat to 对……构成潜在的威胁
6．in addition 此外
7．demonstrate the significance of 论证……的重要性
8．a more prosperous future 一个更加繁荣的未来
