They're pointless. They are empty calories in English.

它们没什么意义，只是英语中没多少价值的赘词而已。

But we found a laser focus on empty calories was not the way to go.

但我们发现，目光聚集在零卡路里上并不是一条可行的道路。

I'm gonna go with soda, source of empty calories, source of a lot of the excess sugar most Americans eat.

我选苏打水，它是空卡路里的来源，也是大多数美国人摄入的大量多余糖的来源。

While tapioca boba are fat-free, bubble tea is loaded with empty calories and, depending on the milk used, potentially also fattening.

虽然木薯粉圆不含脂肪，但珍奶充满了「空热量」(只有热量而无营养价值)加上使用的牛奶，也可能会造饮用者肥胖。

The USDA defines empty calories as calories that come from sugars and solid fats, such as butter and shortening.

美国农业部将空卡路里定义为来自糖和固体脂肪（例如黄油和起酥油）的卡路里。