（六）放射性同位素，是指化学元素中具有相同原子序数，但质量不同且能发生放射性衰变的核素。
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A few months later, the Korean War broke out and his former fellow apprentice pilots were sent to South East Asia. Many never got to finish their education.，这一点在搜狗输入法2026中也有详细论述
2026-02-27 00:00:00:0本报记者 黄培昭 中国技术助力冈比亚水稻增产，当地农户感慨——