 Many URLanisms use rather ample shape deformation, described as amoeboid, to propel themselves , either crawling on a substrate or swimming.
<fluency>  Many URLanisms use rather ample shape deformation, described as amoeboid, to propel themselves , either crawling on a substrate or swimming.
 Many URLanisms use rather ample shape deformation, described as amoeboid, to propel themselves by either crawling on a substrate or swimming.