A gust of wind knocked him off balance and he fell face down in the mud.

一阵大风吹得他失去了平衡，脸朝下摔在了泥里。

《柯林斯英汉双解大词典》

This newspaper maintains a good balance in its presentation of different opinions.

这份报纸不偏不倚地报道不同的意见。

《牛津词典》

The long-term future of the space programme hangs in the balance.

航天计划的长远前景尚未明朗。

《牛津词典》

These urge local officials to balance to risk of flu in their communities with the problems that school dismissals could cause.

VOA: special.2009.08.13

By keeping women under the household of the men of their original family, the upper-class Romans tried to balance these different households in size and importance.

所以女子保留娘家的家户关系，有助于罗马上层阶级,平衡不同家户的规模及地位。

耶鲁公开课 - 新约课程节选

And, that's given by the balance between the attractive force of the ions offset by the repulsive force in the electronic shells.

而那是由,在离子的电子层之间的,引力和斥力相互抵消得到的。

麻省理工公开课 - 固态化学导论课程节选

Such purchases of raw materials still count as U.S. imports in balance of trade.

FORBES: Is 95% of the Trade Imbalance Legal Tax Evasion?

The results there and in Ninewa province, which includes the equally disputed (and recently much bloodier) city of Mosul, appear to reflect a shift in the balance of power of the Kurds in the north which alarms many Iraqi Arabs as well as Turkey's and Iraq's Arab neighbours.

ECONOMIST: Iraq's Kurds

It has arisen because of a fundamental shift in the balance of power in the marketplace from seller to buyer.

FORBES: Not Just The U.S.: Worker Disengagement Is Worldwide