curve 指变成曲线或弧线状的动作或状态。
bend 普通用词，指把某物变成曲线或角形。用于人时，指头部或身躯弯下。
bow 指把头部或上身弯向前方的动作，也指社交中的礼节性动作。
crook 指不规则的弯曲，也指按照规则或模型弯曲某物。
twist 指通过转动、拧或扭使某物成弯曲状。
参考例句
1. He bent the bar into the right shape. 他把棒弯成适当的形状。
2. She struggles to bend her knees. 她奋斗着将她的膝盖弯曲。
3. I bend and I break not. 我只要俯下身去，就折不断。
英英解释
n.
1. a circular segment of a curve
2. movement that causes the formation of a curve
3. curved segment (of a road or river or railroad track etc.)
4. an angular or rounded shape made by folding
5. a town in central Oregon at the eastern foot of the Cascade Range
6. diagonal line traversing a shield from the upper right corner to the lower left v.
1. form a curve
2. change direction
3. cause (a plastic object) to assume a crooked or angular form
4. bend one's back forward from the waist on down
5. turn from a straight course , fixed direction, or line of interest
6. bend a joint
