论文部分内容阅读
在长江流域以及华南一带,生长着一种經济林木——樟树。它是东南亚的特产。它盛产于我国,特別是台灣省。我国的樟脑产量占世界首位。樟树叶子呈卵圓形,三出脉,树干高大,枝叶繁茂,团团如盖。樟树最大的特征是无論枝、叶、根、树皮、树干都具有濃郁的气味。这是由于它含有樟脑和樟油的緣故。樟树有几种。叶柄紅色的叫赤樟。叶柄青色的叫青樟。有种樟树叶子較大較长,叫大叶樟。同是一种樟又可分为几个不同的品种,它們的經济性状不同。有的品种,樟脑含量多于樟油,有的樟油多于樟脑;有的所含的樟油特別芳香……樟脑(C_(10)H_(16)O)是一种有机
In the Yangtze River basin and southern China, there is an economic forest tree - eucalyptus. It is a specialty of Southeast Asia. It is abundant in China, especially in Taiwan Province. The camphor production in China ranks first in the world. Eucalyptus leaves are ovoid, three veins, tall trunks, luxuriant foliage, and groups are covered. The biggest feature of eucalyptus is that it has a strong odor regardless of branches, leaves, roots, bark, and trunk. This is because it contains camphor and oyster sauce. There are several kinds of banyan trees. The petiole red is called red peony. The petiole green is called the blue bark. A species of eucalyptus leaves larger and longer, called big leafhopper. The same species can be divided into several different species, and their economic characteristics are different. Some species have more camphor content than oyster sauce, some have more oyster sauce than camphor, and some contain eucalyptus oil which is particularly aromatic... camphor (C_(10)H_(16)O) is an organic