W: You should lose weight. 
你应该减肥了。
M: Don't you think I am good enough? 
你觉得我的身材不好吗?
W: Look at your beer belly. 
看看你的啤酒肚。
M: I've added ten kilos recently. 
我最近重了10公斤。
W: You really should lose weight. 
你真的应该减肥了。
M: I'll do that this weekend. 
我会从这个周末开始减肥。