徹底改變對(duì)不可再生資源的非理性濫用是絕對(duì)有必要的。例如，必須開(kāi)發(fā)節(jié)能的機(jī)動(dòng)車(chē)減少汽油的消耗量，并且必須找到可替代能源取代煤。
2. While achieving success is easier said than done , persistence does in fact pay off . One of the most important traits of a successful person is self-confidence , another is desire , and still another is determination .
獲得成功說(shuō)起來(lái)比做起來(lái)容易，然而堅(jiān)持不懈確實(shí)會(huì)有好結(jié)果。成功人士的最重要的特征之一是自信，第二是渴望，還有一個(gè)是決心。
3. Recognizing a problem is the first step in finding a solution .
認(rèn)識(shí)到問(wèn)題是找到解決辦法的第一步。
4. Many of the explanations offered thus far are at least to a certain extent valid , but none fully address the problem and the issue must be examined in a wider context .
目前提供的許多解釋至少在一定程度上是正確的，但是，沒(méi)有一個(gè)解釋能完全處理問(wèn)題，這件事情必須放在更廣闊的背景中考慮。
