offspring
后代  

例句：
The practice of rearing unrelated offspring occurs in several ant species.
只有几种蚂蚁可以抚育与自己并不相关的后代。
 

keep one's chin up
不气馁，不灰心
  
例句：
Keep your chin up and you still have a profusion of chances for you to improve your relationships with them.
别灰心，你还有很多机会改善你和他们的关系的。

You are just saying that.
你只是说说而已。

对话：
A: Rose, this dress looks fabulous on you.
B: You are just saying that. Actually, it's old-fashioned.
A: No, It's far from being out of fashion. It fits you well.

A：露丝，你穿上这件衣服真漂亮。
B：你只是说说而已。实际上，它的样式有点过时了。
A：不，它一点儿也不过时。你穿上很合身。