常見例句雙語例句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，杜仲膠高彈性體的出現(xiàn)，是其研究開發(fā)進(jìn)入新階段的標(biāo)志。 返回 gutta percha