在英语中，当某人变胖时，我们常用 "gain weight" 来表示，这是因为 "gain" 在这里表示 "增加" 或 "获得" 的意思。"Weight" 则表示 "体重"。
例句：
"He has gained a lot of weight recently." (他最近变胖了很多。)
"She put on a few pounds over the hopday season." (在假期期间，她体重增加了几磅。)
"I need to start exercising if I don't want to gain any more weight." (如果我不想再变胖，我就需要开始锻炼了。)
需要注意的是，"gain weight" 这个短语通常指人因为吃得太多或活动量减少而导致的体重增加，并不涉及到健康问题。如果想要表达某人体重增加是因为某种健康原因，可以使用 "put on weight" 或 "gain fat"。
例句：
"She put on weight due to a hormone imbalance." (她体重增加是因为激素失衡。)
"He gained fat because he stopped exercising and started eating unhealthy foods." (他变胖是因为他停止了锻炼，开始吃不健康的食物。)
例句：
"He has gained a lot of weight recently." (他最近变胖了很多。)
"She put on a few pounds over the hopday season." (在假期期间，她体重增加了几磅。)
"I need to start exercising if I don't want to gain any more weight." (如果我不想再变胖，我就需要开始锻炼了。)
需要注意的是，"gain weight" 这个短语通常指人因为吃得太多或活动量减少而导致的体重增加，并不涉及到健康问题。如果想要表达某人体重增加是因为某种健康原因，可以使用 "put on weight" 或 "gain fat"。
例句：
"She put on weight due to a hormone imbalance." (她体重增加是因为激素失衡。)
"He gained fat because he stopped exercising and started eating unhealthy foods." (他变胖是因为他停止了锻炼，开始吃不健康的食物。)