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source:n.something that provides something else 来源
energy:n.the power a person needs to do something 精力;活力
variety:n.different kinds of things 多种多样
advise:v.to suggest;to recommend 建议
cheeseburger:n.a hamburger with cheese on it 干酪汉堡包
milkshake:n.a sweet drink made of milk and ice cream 奶昔
increase:v.to cause to grow 增加
heart attack:a condition in which blood suddenly stops flowing to a person's heart 心脏病发作
intelligent:adj.clever or smart 聪颖的；有才智的
decide on:to choose 选定
tell…from:to be able to know the difference between 区分
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