在有孔虫壳的方解石中发现的氧-16和氧-18的比例取决于该生物生存处的水温。
The ratio of oxygen-16 to oxygen-18 found in the calcite of a foraminifer's shell depends on the temperature of the water in which the organism lived.
具体而言，他们看到了微壳形成的被称为有孔虫的生物体遗体。
Specifically, they looked at the remains of microscopic shell-forming organisms known as foraminifera.
北里洋的研究小组推测软壳有孔虫之所以在马里·亚纳海沟的泥里能够兴旺发达是因为它们是为数不多的能够抵挡那儿如此巨大压力的生物。
Kitazato's group speculates that soft foraminifera thrive in the Mariana mud because they are among the few creatures that can withstand the huge pressures there.
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