The depth column has one track on the left and two tracks on the right.

深度栏左边具有一个记录道、右边具有两个记录道。

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"Whales, on the other hand, often feed at depth," says Roman. "So they feed low in the water column."

“另一方面，鲸鱼通常在深海觅食，”罗曼说：“它们在深水层吃东西，在海面附近排便。”

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The group will change the depth of the sand column, add rusty nails to several pails (in an effort to increase virus removal), and alter other parameters.

研究小组还将使用改变沙柱深度，在几个桶里添加生锈的钉子（增加病毒移除的效果），和改变其他参数等方式加以实验。

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It is a collaborative partnership of more than 30 nations from all continents, all working together to provide a seamless global array of over 3, 000 profiling floats moving up and down in the water column from the sea surface to 2, 000 meters and measuring temperature, salinity, and depth during every ascent to the sea surface.

UNESCO: Building the Wealth of Nations