1·The most difficult part was to keep balance.
最困难的部分是保持平衡。
2·As a matter of the utmost urgency, the world has to keep balance between over population and finite resources.
当务之急是，世界必须在过剩的人口和有限的资源之间保持平衡。
3·Keep balance, must balance!
保持平衡，一定要平衡！
4·How to keep balance diet?
如何保持平衡的饮食？
5·You'd better keep balance of your diet.
你最好是保持均衡的饮食。
6·She holds his arm firmly to keep balance.
她紧紧地抓着他的胳膊来保持平衡。
7·The child couldn't keep balance on his new bicycle.
小孩骑车不能保持平衡。
8·And what is more, it is a good way to keep balance of status mind.
而且，它是一种保持心态平衡的好方法。
9·Colleagues let his handle hang over their shoulder to keep balance.
同事们让他把手搭在他们的肩膀上以保持平衡。
10·Life is like riding a bicycle, to keep balance will be constant motion.
生活就像骑自行车，要想保持平衡就要不断运动。