用800x600解像
可得最佳瀏覽效果

十塊木頭,十個故事.

龍眼

Ten Woods, Ten Stories

- Longan (Dinocarpus longan)

圖中的木塊是屬於龍眼的,新鋸出來.照常理你應該一眼便看出此木塊有什麼不妥的地方.我們常說樹木的年齡可以用樹幹的年輪來計算,那麼這棵龍眼應該是幾多年呢?看得出分別吧.其實樹木的導管分佈有分為隱輪和顯輪的,龍眼便是隱輪的一種,是分不出年輪的.當你再留意書本時,你會發現書中指以年輪計算樹齡的是指大多數樹木,而不是全部呢!

The wood as shown in the diagram is newly sawed out Longan.  Just at a glance, you should be able to tell what is wrong with it.  It is often said that the age of trees can be determined by the number of growth rings.  Then, how old is this Longan tree?  Are you able to tell?  In fact, the vessel distribution of trees can be categorized into two: diffuse porous and ring porous .  Longan is the former, so the growth rings are not obvious.  When you read the reference books again, you will find that the general theory of determining the age of tree by the number of growth rings only applies to most trees, NOT all!

*translated by Mary Chung

作者: Leon Lau, 譯者: Mary Chung

facebook群組, s94096507@gmail.com

 

Men having any kind of prostate problems or problems of high blood pressure are recommended to lower their usual dosage of Buy Generic Cialis Online.