mechanical characteristics短语¹³¹⁶²⁰⁺³ 基本例句 机械特性 The physical and mechanical characteristics of ice have great complexity, and the understanding in these complex characteristics of the ice force mechanics community is not mature. 这主要是因为：冰材料自身的物理力学性质具有极大的复杂性，目前冰力学界对这些复杂特性的认识水平还不成熟； cnki