He was always optimistic, even when things were at their worst.
他即使在情况最糟糕的时候也总是很乐观。
We have every reason to feel optimistic.
我们完全有理由感到乐观。
They are cautiously optimistic that the reforms will take place.
他们对是否实行改革表示审慎的`乐观。
She's not very optimistic about the outcome of the talks.
她对会谈的结果不太乐观。
When asked about the company's future, the director responded that he remained optimistic.
问到公司的未来的时候,经理回答说他依然乐观。