firstly… secondly… thirdly… 首先……其次……最后……用表示先后顺序的词语，使文章表达起来结构清晰，观点明确，突出显示了写作的着重点。
第43章 鲈鱼的启示
Catch of a Lifetime
Understand these new words before you read this article.
1. bass['beis] n. 鲈鱼
2. lure[lu？] n. 诱饵
3. ripple['ripl] n. 涟漪
4. gill [d？？l] n. 鱼鳃
5. negotiable[ni'g？u？i？bl] adj. 可以协商的
6. be supposed to 应该
He was 11 years old and went fishing every chance he got from the dock at his family’s cabin on an island in the middle of a New Hampshire lake.