His critics say he's just being silly and petulant.批评家说他就是愚蠢和任性。She could be wayward, petulant, and disagreeable.她有时也会任性 、 脾气很坏 、 很暴躁.He picked the pen up with a petulant gesture.他生气地拿起那支钢笔。...
However, momentum is always conserved in a collision, whether or not the collision is elastic.然而, 不管碰撞是不是弹性的, 在碰撞过程中动量总是守恒的.The elastic interaction between a wedge disclination dipole and an interfacial crack was investi...