I bet you could imagine yourself polishing off 1,500 calories of pizza and ice cream pretty easily, but 1,500 calories of just lean beef will leave you sweating and struggling to swallow in between deep breaths.
我敢打赌,你能轻松地吃完 1,500 卡路里的披萨和冰淇淋,但面对 1,500 卡路里的瘦牛肉,你会汗流浃背,吃得气喘吁吁。