名词
中文翻译：不老药
同义词：
['immortality', 'immortal', 'eternal youth', 'elixir oflife']
例句：
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1. Theancient Chinese emperor was said tohave used this elixir to maintainhis youthful appearance.
据说这位古代中国皇帝曾使用这种长生不老药来保持他年轻的外表。
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2. The legendof the immortelle has been passed down throughgenerations.
这个长生不老药的传说代代相传。
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3. In modern times, scientistsare still searching for the secret ingredients thatmake up an immortelle.
在现代，科学家们仍在寻找构成长生不老药的秘密成分。