Two alligators rest their snouts on the water's surface.
两只鳄鱼把它们的大嘴栖息在水面上。
《柯林斯英汉双解大词典》
2
As a way of reconciling these two facts, scientists have hypothesized that nearly all of the oxygen being produced was taken up by iron on Earth's surface.
为了调和这两个事实，科学家们假设，几乎所有产生的氧气都被地球表面的铁吸收了。
3
The color changes are executed by two different kinds of cells in the octopus' skin, mainly by color cells on the skin's surface call chromatophores.