The suspended particle sizes in the near-bottom layer were close to the bottommud particle sizes, and their grain compositions are also similar to each other.
水柱近底层悬浮颗粒粒径同底质浮泥颗粒粒径大小相近，颗粒组成也非常相似。
2
They scoop up insects and larvae, shellfish, and worms in their bill along with bits of gravel and mud from the bottom.
它把昆虫和幼虫、贝类动物以及蠕虫连同底下的碎石和泥土一起兜到嘴里。
3
Meaning on the bottom is mud, then a layer of something they presume to be oil, and on top of that a two-inch thick goop that Asper calls "slime snot," possibly made up of oil and bacteria.