not be all fun and games

US /nɑt bi ɔl fʌn ænd ɡeɪmz/
UK /nɑt bi ɔl fʌn ænd ɡeɪmz/
"not be all fun and games" picture
1.

并非全是乐趣, 并非轻松愉快

to be serious and difficult, rather than enjoyable

:
Being a parent is not all fun and games; it requires a lot of responsibility.
做父母并非全是乐趣;它需要很多责任。
Working in a startup might seem exciting, but it's not all fun and games.
在初创公司工作可能看起来很刺激,但并非全是乐趣