每种食物中都含有钠，要替代钠比替代含有反式脂肪的部分氢化油和糖要困难得多，因为找到油和糖的替代品十分简单。
Sodium is in every food category, and it is more difficult to replace than the partly hydrogenated oil that composes trans fats, or than sugars, because there are easy substitutes for oils and sugars.
在意大利与瑞士，运输牛奶与乳制品、民用燃料油与日用杂货的车队都采用了蚂蚁觅食法则，以找到送货的最佳行程。
In Italy and Switzerland, fleets of trucks carrying milk and dairy products, heating oil, and groceries all use ant-foraging rules to find the best routes for deliveries.
今后的步骤将涉及对天然藻类进一步筛选，以找到那些在利用太阳能、将二氧化碳转化为油方面效率特别高的品种。
The next steps will involve further screening of natural algae to find strains that are particularly efficient at using energy from sunlight to convert carbon dioxide into oils.
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