be no picnic
US /bi noʊ ˈpɪk.nɪk/
UK /bi noʊ ˈpɪk.nɪk/

1.
不是件轻松的事, 很困难
to be a difficult or unpleasant situation or task
:
•
Raising three children on a single income is no picnic.
靠一份收入抚养三个孩子可不是件轻松的事。
•
Working in that environment can be no picnic, but someone has to do it.
在那种环境下工作可不是件轻松的事,但总得有人去做。