adj.最有利的，有信心的；乐观的

She has an optimistical view of the future, believing that technology will solve many of our current problems.
她对未来的看法很乐观，相信科技将解决我们当前的许多问题。
Despite the economic downturn, he remained optimistical about his business prospects.
尽管经济衰退，他对自己的商业前景仍然保持乐观。
The optimistical forecast for this year's sales growth was revised downward after the first quarter results were in.
今年销售增长的乐观预测在第一季度结果出来后被向下修正。
His optimistical attitude towards life is contagious, and it has positively influenced those around him.
他对生活的乐观态度具有感染力，对他周围的人产生了积极的影响。
The optimistical belief that every problem has a solution kept her going through tough times.
相信每个问题都有解决方案的乐观信念让她在困难时期坚持下来。
The optimistical outlook on the economy has led to increased consumer spending.
对经济的乐观展望导致了消费者支出的增加。
With an optimistical spirit, she embarked on a new career path at the age of forty.
她以乐观的精神，在四十岁时踏上了新的职业道路。
The optimistical assumption that everyone would participate led to overestimating the event's attendance.
每个人都会参与的乐观假设导致了对活动出席人数的高估。
His optimistical prediction about the stock market turned out to be accurate.
他关于股市的乐观预测结果证明是准确的。
An optimistical approach to challenges can lead to innovative solutions.
对挑战采取乐观的态度可以带来创新的解决方案。