campholene

例句：

1. 1.The camphor tree is a popular ornamental plant in China.
   樟树是中国流行的观赏植物。
2. 2.Camphor has been used for centuries to treat respiratory diseases.
   樟脑自古以来就被用来治疗呼吸系统疾病。
3. 3. In ancient times, camphor was also used as a medicinal herb.
   古代，樟脑也被用作药用草药。