432. Another head and chief important reason I have chosen to put here is that human activity causes greenhouse effect.
在這里，我還想強調(diào)的另外一個極為重要的原因就是人類活動導(dǎo)致了溫室效應(yīng)。

六級詞匯講解:
本句也是主體段落中引出遞進關(guān)系的句子。another表示上下文的遞進關(guān)系，head and chief important reason強調(diào)觀點或者原因的重要性，that引導(dǎo)表語從句，后面陳述具體原因。

句型拓展:
Still another important quality is for the boss to have open and good channels of communication with their employees.
其次，優(yōu)秀的老板應(yīng)與員工之間存在公開、良好的溝通渠道。
Advertising also has an indirect impact on improving our lives.
廣告也在間接地改善我們的生活。
Another reason I prefer doing leisure activities outdoors is that there's always something new and different to see.
我之所以更喜歡室外活動，另一個原因是在室外我總能看到新的或不同的東西。
A second purpose of awards or prizes is that it promotes excellence.
頒獎的另一個作用在于鼓勵杰出貢獻。
The other good reason for a teenager to work is to learn the value of money.
青少年做兼職的另一個很好的理由是，他們能因此而明白金錢的價值。