1·Classified by natural products and utilization they can be divided into 6 types: medicinal plants, oil plants, fibre plants, colophony and balata plants, perfume plants and amylum plants.
按其产物和用途可分为6类：药用植物、油料植物、纤维植物、树脂和树胶植物、芳香油植物以及淀粉植物等。
2·He was shocked by this greatly. From that on, in his artworks he began to use deserted plastic film and fill rubbish and the prepared balata.
这对他刺激很大，从那以后，他在作品中开始使用废弃的塑料膜，并往里面填充垃圾和调色的树胶。