事实：达芬奇眼中的树-Da Vinci’s Rule of the Trees
时间：2019-02-08 作者：英语课 分类：Facts-事实
英语课
Pre-Listening Vocabulary
observation: something that you see
cross section: a view of the inside of something after a cut has been made across it
hold true: remain a fact or truth even in other situations
ideal: suitable
sap: fluid (sugar and minerals) inside a plant
resistant 1: able to withstand
Da Vinci’s Rule of the Trees
Over 500 years ago, Leonardo da Vinci made an interesting observation about trees. He concluded that the total thickness of a tree’s branches at a certain height almost always equals the total thickness of the tree trunk. In other words, as the tree splits into branches, the cross section of the branches remains 2 equal to the cross section of the trunk. This observation holds true for almost all trees. When trees begin to split, they make exact copies of themselves. Scientists believe that there are two reasons for this law of nature. Firstly, this design is ideal for transporting sap through a tree. Secondly 3, this structure makes a tree more resistant to wind. Artists commonly use Leonardo da Vinci’s rule of nature to design real-looking trees.
adj.(to)抵抗的，有抵抗力的
- Many pests are resistant to the insecticide.许多害虫对这种杀虫剂有抵抗力。
- They imposed their government by force on the resistant population.他们以武力把自己的统治强加在持反抗态度的人民头上。
n.剩余物，残留物；遗体，遗迹
- He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
- The remains of the meal were fed to the dog.残羹剩饭喂狗了。