im-,不，非，来自im-的字母m开头前的拼写异化形式，balance,平衡。

1. The illness is triggered by a chemical imbalance in the brain.

这种疾病是大脑化学物质失衡诱发的。

2. An imbalance in certain chemicals leads to disturbances in the brain's function.

某些化学成分失衡会道致大脑功能的紊乱.

3. Increased recruitment of women engineers will help correct the gender imbalance in the profession.

多聘请女工程师有助于平衡这一职业中存在的性别失衡.

4. The trade imbalance is likely to rise again in 1990. Hence a new set of policy actions will be required soon.

贸易失衡可能会在1990年再次加剧。因此需要很快采取一系列新的政策行动。

5. Social imbalance worries him more than inequity of income.

社会失衡比收入不公平更令他忧虑。