在英语中，"不起眼的小草"可以翻译为 "unassuming grass."

这个表达的来源可能是指一种生长在较低的地方的草，它不引人注目，也不占据太多的空间。

下面是一些例句和翻译：

The unassuming grass seemed to blend in with the rest of the landscape. (这片不起眼的小草似乎与周围的景观融为一体。)

Despite its small size, the unassuming grass was able to thrive in even the most difficult conditions. (尽管体型很小，这片不起眼的小草却能在最困难的条件下茁壮成长。)

The unassuming grass was often overlooked by people passing by, but it played a crucial role in maintaining the health of the ecosystem. (人们经常忽略这片不起眼的小草，但它在维护生态系统健康方面起着至关重要的作用。)