许多烈士为了自由牺牲了他们的生命。
Many martyrs sacrificed their lives for freedom.
许多传教士奉献他们的生命来帮助他人。
Many missionaries dedicate their lives to helping others.
一些理想主义者把他们的生命奉献给社会事业。
Some idealists dedicate their lives to social causes.
科学家们希望他们的发现将会揭示外太空可能存在的生命。
The scientists hope their discoveries will shed light on possible life in outer space.
他们的生命真是浪费。
Their lives are forfeit.
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