粒子播放一次后销毁：

        //ref: http://answers.unity3d.com/questions/219609/auto-destroying-particle-system.html

        //ref: http://answers.unity3d.com/questions/41855/cannot-implicitly-convert-type-unityengineobject-t.html

        particle.GetComponent<ParticleSystem> ().Stop ();

        particle.GetComponent<ParticleSystem> ().Play ();

        float particleDurTime = particle.GetComponent<ParticleSystem> ().duration + particle.GetComponent<ParticleSystem> ().startLifetime;

        Destroy (particle, particleDurTime);