high concentration layer near bottom 底部高浓度含沙水体层
The suspended particle sizes in the near-bottom layer were close to the bottom mud 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。
Atmospheric boundary layer, that is, the atmosphere near the bottom of some of the ground.
大气边界层，便大气层靠远地里的底层部门。
The total carbon dioxide concentration increases from the surface layer to the bottom layer, and from the shelf break area to the near shore and to the outside sea.
总二氧化碳浓度自表层至底层和自陆架坡折区到近岸和外海由低变高。
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