adventitious

adj.偶然的,外来的

偶然的；非根本的；附带的

形容词

1. The discovery of the lost manuscript was purely adventitious.
发现这篇失落的手稿纯粹是偶然的。

2. These plants are not native to this area; they are adventitious species.
这些植物不是这个地区的本土物种，它们是附带进来的物种。