水旦(shuǐ dàn),是一个汉语词汇,是荷花的别名,出自《苏氏演义》。
你一旦下了水,就会觉得水里挺舒适。
一旦蔬菜开始加热烹调,就加入几汤匙水。
Once the vegetables start to cook add in a couple of tablespoons of water.
在正常水相下,河流最终流入海洋,而一旦进入海洋,磷就被藻类等水生植物吸收。
In a normal water phase, rivers eventually empty into oceans, and once in the oceans, the Phosphorus gets absorbed by water plants like algae.
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