a balancing act的意思是左右逢源，兼顾各方。这个表达来源于马戏表演。
- The life of a modern parent is a balancing act of going out to work and raising children at home.
- My sisters are always fighting between themselves. Keeping the peace at home is a balancing act.
值得注意的是，to balance something against something else 的意思是对事情进行权衡比较。
- During a recession a government has to balance the needs of the poorest against the wishes of the richest.
