表明自己的计划与决心的口语

2.Or else we can not exist in the society and will be obsolete. 
不然我们就不能立足于社会，会被社会所淘汰。

【其他表达】

The mother went to great lengths to provide her children with good education, to enable them to find their feet in a crowd.
那位母亲不惜一切使她的孩子接受良好的教育，以便使他们能立足于社会。

He was shunned by society.
他被社会所摈弃。

【Tips】

establish oneself in society    立足社会