be/hang in the balance

1. 悬而未决

For a long time his fate was in the balance.

他的命运很久未能确定。

keep one's balance

1. 保持平衡

A little child has to learn to keep its balance before it can walk far.

小孩子在能走远之前先要学会保持平衡。

on balance

1. 总的来说

On balance, we have a good chance of winning the race.

总的来说, 我们很有希望赢得比赛。