他们种的橡胶树刚开始产胶。
The rubber trees they had planted were just starting to yield.
巴西橡胶树是热带、亚热带地区大范围种植的一种重要的产胶植物，99%以上天然橡胶来源于巴西橡胶树。
The rubber tree (Hevea brasiliensis) has been an important economic crop which has a large-scale cultivation in the tropical and subtropical regions, and 99% natural rubber comes from it.
这说明橡胶树品系的产排胶具有特异性，需要建立品系适宜性割胶制度。
These results suggested that there were specificity in latex production among clones, and it needs establish clone-suitable tapping systems.
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