中英释义：
重点词汇
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恒久
permanent; lasting; enduring; eternal; perpetual; timeless; everlasting
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不变的
unchangeable; stedfast; steadfast; abiding; changeless; immobile; unaltered; invariable
恒久
permanent; lasting; enduring; eternal; perpetual; timeless; everlasting
不变的
unchangeable; stedfast; steadfast; abiding; changeless; immobile; unaltered; invariable