costus root oil

例句：

1. 1. The aromatic oil from the costus root has been used for centuries to treat skin conditions.
   香胶树脂的芳香油被用于治疗皮肤疾病数百年。
2. 2.The traditional method of making this oil involves boiling the roots in water and then straining out the solid matter.
   制作这种油的传统方法是将根煮沸在水中，然后过滤掉固体物质。
3. 3. Due to its anti-inflammatory properties, costus root oil is often used as a natural remedy forvarious ailments.
   由于其抗炎特性，香胶树脂油常被用作各种疾病的自然疗法。