n.樂觀；樂觀主義

A mood of optimism pervaded the gathering. 會上充滿樂觀的氣氛。

We view these changes with guarded optimism. 我們以審慎的樂觀看待這些變化。

We are influenced by his radiant optimism. 他那具有感染力的樂觀主義影響了我們。

In the poem, Tate is speaking his usual blind optimism. 在這首詩里，泰特表達(dá)出了他通常的那種盲目的樂觀主義。