hardness and opportunity

• 困难与机遇

hardness and opportunity的用法和样例：

例句

1. America is the land of freedom and opportunity.
   美国是一个拥有自由与机遇的国度。
2. Based on the experience and models of Chinese teaching in Singapore, the paper discusses the challenges and opportunities of TCSL in a multi-lingual situation.
   摘要本文以新加坡华语教学经验与模式为基础，探索在多语环境下汉语作为第二语言教学的挑战与机遇。