con-, 强调。-str, 拉长，拉紧，词源同strict,strain.

1. The police used horses to constrain the crowd from violence.

警察骑着马阻止那群人诉诸暴力.

2. It's the capacity of those roads which is going to constrain the amount of travel by car that can take place.

制约驾车出行量的将会是那些道路的通行能力。

3. If they can, constrain him to belong to their desperate odd - fellow society.

要是可能, 还要强迫他参加他们无可救药的畸形社会.

4. As with dragging, a meta - key is often used to constrain the direction of a resize interaction.

和拖动一样, 元键在这里也可以用来约束调整尺寸操作的方向.

5. A strong magnetic field can constrain electrons to move only along the field lines.

强磁场可约束电子使之只能沿着场力线运动.