virgin resin的用法和樣例：
例句
- Pitch resin was synthesized from benzaldehyde and heavy oil residue.
利用純芳烴原料和重質渣油研製的瀝青樹脂具有優良的耐熱性。 - The experimentss show that the elastic modulus of fiber-filled solidified resin is much higher than pure solidified resin, and the shrinkage of the former is less than the latter.
實驗發現複合材料製作的樣件的彈性模量和拉伸強度明顯高於純樹脂固化樣件，且其在後固化過程中的收縮量也比後者小。
