He said multicellular organisms likely evolved in many places, but the fossils haven't yet been found.
他说多细胞生命可能在多处地点演化，只是其化石尚未被发现而已。
When scientists did find multicellular organisms, they assumed that they'd sunk from oxygen-enriched waters.
而当科学家们确实在深海发现这种多细胞有机生物时，他们曾猜想这些生物是从富氧水域沉降而来的。
Sure enough, cancer is found in almost all multicellular organisms, suggesting its origins stretch back hundreds of millions of years.
毫无疑问，几乎所有的多细胞生物中都发现了癌症，这暗示着癌症的起源可以追溯到数百万年前。
应用推荐