And it kinda looked like a flipped-over stalkless sea lily.

它看起来有点像翻过来的无柄海百合。

It was the age of weird fishes and plated sea lilies.

那是奇怪的鱼和镀金海百合的时代。

So, the first starfish may have originated from a sea lily that faceplanted, putting its mouth down on the seafloor.

因此， 第一只海星可能起源于一种面朝下的海百合，将嘴巴放在海底。

Cantabrigiaster had the thick arms of a starfish but, like sea lilies, lacked small hard plates along the edges of its arms.

Cantabrigiaster 有海星一样粗的手臂，但像海百合一样， 手臂边缘没有小的硬板。

Crinoids became the most abundant echinoderms of the Ordovician, and some were the ancestors of today's stalkless feather stars and stalked sea lilies.

海百合成为奥陶纪最丰富的棘皮动物，有些是今天无柄羽星和有柄海百合的祖先。

I explain it on two grounds, I replied. In the first place, because vertical currents, which are caused by differences in the water's salinity and density, can produce enough motion to sustain the rudimentary lifestyles of sea lilies and starfish.

我用两个理由来解释，我回答，第一，因为那些上下垂直往来的水流，由海水的不同咸度和不同密度决定，发生一种运动，足以维持海百合和海星一类的原始基本生活。