1. The chair form was a rigid, stable entity incapable of interconverting to other form. 椅子结构是一种刚性的，不能转变为其他形式的稳定实体。
2. They reinforce the notion that the child is incapable of good behavior without coercion. 父母们强化了这种观念：不施压，孩子是养不成好行为的。
3. It is even more pernicious in the interface because it immediately makes the user feel incapable of using the product. 界面上的此类问题甚至更加有害，因为用户立刻就会感觉到他们无法使用这个产品。
英英解释
adj.
1. (followed by `of') lacking capacity or ability
2. not being susceptible to or admitting of something (usually followed by `of')
3. lacking the necessary skill or knowledge etc.
4. (followed by `of') not having the temperament or inclination for
5. not meeting requirements
