1. 低估；对…估计不足
    If you underestimate something, you do not realize how large or great it is or will be.

    e.g. None of us should ever underestimate the degree of difficulty women face in career advancement...
           我们谁都不应该低估女性在事业发展过程中所面临的困难程度。
    e.g. Never underestimate what you can learn from a group of like-minded people.
           千万不要低估你从一群志趣相投的人那里所能学到的东西。

2. 低估;轻视;小看
    If you underestimate someone, you do not realize what they are capable of doing.

    e.g. I think a lot of people still underestimate him...
           我觉得很多人仍然低估了他。
    e.g. The first lesson I learnt as a soldier was never to underestimate the enemy.
           作为一名士兵，我学到的第一课就是决不要低估敌人。