海沟最明显的界限是东部靠大陆的地方：海水深度突然从两三百米（浅蓝色）迅速降低到数千米（深蓝色）。
The trench is most sharply defined on the eastern (continental) side: depth plunges rapidly from a few hundred meters (light blue) to several thousand meters (deep blue).
这张地形和海水深度地图显示了俯冲带对地表景观的影响。
This map of topography and water depth reveals subduction’s influence on the landscape.
如果这对所有的企鹅都是成立的话，那么这种古代企鹅的潜水深度和现在相比是完全不同的。
If that holds true for any penguins, then the dive depths achieved by these giant forms would've been very different.
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