英语语法分析

But until recently, we knew nothing about these mechanisms in metazoans.

然而直到最近人们对后生动物的这些机制几乎仍一无所知。

Another oceanic resident, the quahog clam (Arctica islandica), is thought to be one of the longest lived metazoans of all.

另一位海洋居民—圆蛤被认为是世界上最长寿的后生动物。

More evidences indicate that the brain has a principle role in sensing dietary restriction and extending lifespan in metazoans.

越来越多的证据表明，后生动物大脑在感应饮食限制和促进寿命延长中起关键作用。