名词
中文翻译：Unknown
同义词：
['Optimism', 'Enthusiasm', 'Optimistic']
例句：
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3. 例句：1. She is always optimistic about the future.
她总是对未来持乐观态度。
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2. He has an enthusiastic personality that inspires others.
他具有热情的性格，这激励了其他人。
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3. The team's positive attitude contributed to their success.
团队的积极态度促进了他们的成功。