中国正式加入WTO后国产片将面临更为严峻的挑战和考验。
Mechanics principle is the theoretic foundation of animated drawing design, especially, gravity, air resistance, ground friction force and inertia force, elasticity principle are used abroad.力学原理是动画设计的理论基础,其中重力、空气阻力、地面摩擦力以及惯性力、弹力原理在动画设计中运用较多。