它会使我们发胖可以用英语说成 "it will make us gain weight"。这个说法来源于人们通常认为，如果一个人摄入的卡路里（即能量）超过了他或她每天消耗的卡路里，那么这个人就会增加体重。
例句：
Eating too much junk food will make us gain weight.
吃太多垃圾食品会使我们发胖。
Skipping exercise will make us gain weight.
跳过锻炼会使我们发胖。
Consuming too many calories will make us gain weight.
摄入太多卡路里会使我们发胖。