1. It points out that the birth of Gutta-Percha rubber with high elasticity is a sign that the research-development of Gutta-Percha has entered into a new stage.
指出，杜仲胶高弹性体的出现，是其研究开发进入新阶段的标志。
来自互联网
2. It points out that the birth of Gutta-Percha rubber with high elasticity is a sign that the research-development of Gutta-Percha has entered into a new stage.
