grassroots 可以用作名词或形容词，它本身就有词尾-s；意思是“基层民众（的）”“普通百姓（的）”“草根（的）”。再如：

He has been criticized for losing touch with the party's grassroots. 他因疏远了党内基层成员而受到指责。

Many people in/at the grassroots are still angry about the election. 多数普通民众至今仍觉得那场选举令人愤慨。

We need support at grass-roots level. 我们需要基层的支持。

A grassroots environmental movement has sprung up. 基层的环保运动已经涌现。

The young candidate hoped to gather votes at the grassroots level in his own neighborhood. 那个年轻的候选人希望从他周围的普通民众中拉到更多的选票。

You have to join the party at grassroots level from what I understand. 据我的了解，你得由基层组织入党。