The toothpicks will help suspend the avocado pit in water and keep the top part of the pit in fresh air and the fat base of the pit under the surface of the water.

牙签可以帮助把油梨核在水里撑起来，让上部在新鲜空气里，肥大的下部在水下。

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Basically surface Earth is mostly ocean with a scoop of fresh water on top.

基本上可以这么说，地球表面上空是一个拥有巨量水源的大洋。

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When studying on the campus, I see the fishes come to the surface of the water to enjoy the fresh air.

当在大学校园学习时，我瞧见了鱼儿们在雨天露出水面呼吸着清新的空气。

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The Great Lakes basin contains a huge treasure, about 20 percent of the world's and a whopping 95 percent of the nation's fresh surface water.

NPR: Governors Meet on Access to Great Lakes

The sea ice expanded during Southern Hemisphere autumn and winter in response to the development of a fresh, cool surface water layer, which floated on the denser, warmer salty sea water below.

BBC: Melt may explain Antarctica's sea ice expansion

In the center of the ocean, wind-driven currents bring fresh water to the surface, so stirring the ocean could transform it into a well-organized storage depot.

NEWYORKER: The Climate Fixers