9、There is a need to recognize the importance of difficulties and frustrations.

【译文】

我们有必要认识到困难和挫折的重要性。

【分析】

本句可以用在议论文的主体部分，用于过渡到分析原因或在文章结尾处过渡到提出建议，说明建议的必要性。

10、When all the factors are examined, we may reasonably come to the conclusion that too much love is harmful and appropriate frustration is necessary to children's growth.

【译文】

考查到所有的因素，我们可以合理地得出结论，那就是，溺爱有害，而适当的挫折对于孩子的成长是有必要的。

【分析】

本句常用子文章结尾，对前文提出的观点进行总结，重申主题。When all the factors are examined还可以替换为 Considering/Examining all the factors 或者 Based on all the factors discussed above 等。