You can make sure the white vegetables stay white by squeezing a teaspoon of fresh lemon juice into the cooking water.

在水煮的时候加一勺新鲜柠檬汁就可以防止这些白色的蔬菜变色。

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Though they can obtain a large portion of their water from fresh fruits, vegetables and greens, they will still require water from a water bottle to stay healthy.

虽然他们可以从新鲜的蔬菜、水果和鲜草得到大量的水，但仍需要水瓶中的水来保持健康。

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Rainbows stay in fresh water their whole lives.

虹鳟的整个生命周期都停留在淡水中。

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She said they could not survive long in fresh water and tended to stay nearer the estuary, where the saline level was higher.

BBC: Grey seal spotted in Bewdley and Stourport-on-Severn