The Importance of Using Words Correctly
Everybody uses words with special meanings. The more exact we are, the more likely we are to use such words. A word, properly used, can be as useful as several sentences, or even a picture.
As you study science, you will find that a diagram, a drawing, or a photograph may also help you learn and under stand. Each of these special words describes a kind of picture. It is important to learn the exact meanings of words like these. A photograph is a picture made with camara. A drawing is a picture done with a pencil, a pen or crayons. A diagram is a drawing that shows the important parts of a thing.
You will learn science words by learning their definitions. This means that you will learn how to describle what science words mean using other, more familiar words. Soon you will find how easy it is to express yourself clearly with the help of science words.
Learning to use science words correctly is not different from learning to do anything well. We learn by practising and by constantly trying to improve. It is not so important to say the definitions of words, but it is quite important that we learn to use words corretly to express ideas.
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作者闡述了準確運用辭彙的重要性，並建議讀者通過學習具體辭彙尤其是科學辭彙的定義來掌握詞的所指，達到正確使用的目的。雖然轉接詞用得不多，但語句簡單、明了，行文流暢。
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正確使用語言的重要性
人人都使用具有特殊意義的辭彙。我們做事越是嚴謹，就越有可能使用這樣的詞。一個詞若用得恰當，其作用相當于幾個句子，甚至一幅圖畫。
在學習科學的時候，你會發現一個圖解，一個製圖或者一張照片有可能幫助你搞清楚，開明白一些問題。這些特殊詞語中的每個記號都描述一種圖畫。了解這些詞的確切意義很重要。照片是用照相機製成的圖畫;製圖是用鉛筆，鋼筆或炭筆描繪出來的圖畫;圖解則是解釋說明某件物品重要部位的繪圖。
你可以通過學習其定義來學習科學詞語。這就意味著你將學習怎樣用其他更熟悉的記號來描述科學辭彙的含意。很快你就會發現借助科學詞語使自己表達清楚是多麽容易。
學習正確使用科學詞語與學好做其他事沒有什麽不同。我們通過練習和不斷的嘗試來長進。說出詞語的定義並不重要，但是學會正確使用詞語表達思想是非常重要的。