例句
Actually, it does not have to do this while there are enough grassroots on sand for them to survive through dry season.
其实，沙鼠不用往自己的洞里叼，沙地上的草根足以使它们度过旱季的，可沙鼠们不这样做便焦虑不安。
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。