这些人工合成的化学物质有甜味，但它们不含卡路里。
These synthetic chemicals taste sweet, but they have no calories.
很多水果蔬菜含水量高，占空间有分量却不含卡路里。
Many fruits and vegetables are high in water content, which provides volume and weight but not calories.
好好想想，一杯低脂低碳的健怡可乐或伏特加会不含卡路里吗？
Think that a low fat, low carb diet coke and vodka has no calories?
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