他们通过分析海水透明度(受浮游植物影响)记录发现了这一问题。
They made their finding by looking at records of the transparency of sea water, which is affected by the plants.
由于叶绿色能使大量浮游植物聚集的区域发出显眼的绿光，因此研究者通过海水透明度测量设备对叶绿素浓度进行检测。
The researchers looked at measurements of ocean transparency and tested for concentrations of chlorophyll, which gives large Numbers of phytoplankton a distinctive green sheen.
这里海水的透明度是最高的，而且，海岸上有许多深入岛内的河口、海湾。
The transparency of sea water here is the highest, and on the coast of the island there are many in-depth mouth of the Gulf.
这里海水的透明度是最高的，而且，海岸上有许多深入岛内的河口、海湾。
The transparency of sea water here is the highest, and on the coast of the island there are many in-depth mouth of the Gulf.
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