以下为句子列表：
英文: Given the decay rate of 26Al, the lower initial ratio in the chondrules implies that these objects formed between one million and two million years after the creation of the refractory inclusions (assuming that the radioisotope was indeed homogeneously di
中文: 以铝26的衰变速率估计，这些球粒的初始比值较低，表示它们是在耐火包体产生后100~200万年才形成（假设铝26在早期太阳系中确实是均匀分布的）。
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英文: Radioisotope dating of the impact-melt samples—rocks that melted when an asteroid or comet struck the moon, therefore revealing when an impact occurred—shows that all these basins formed in a narrow interval between 3.9 billion and 3.8 billion years ago.
中文: 利用放射性同位素为撞击熔融物（在小行星或彗星撞击月球时熔化的岩石，因此它们能显示撞击发生的时间）定年，显示这些盆地都在39~38亿年前一个很短的时间内形成。
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英文: This article briefly describes the advancement of application of radioisotope in tumour brachytherapy, mainly on the aspects as below: applied fields, kinds of isotope and marked drugs etc.
中文: 摘要近年来，放射性核素在肿瘤内照射领域的基础研究和临床应用均取得了较大发展。
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英文: Conclusion: B-ultrasound, thyroid radioisotope scanning, aspiration biopsy of thyroid gland and X-ray cheque are helpfulfor the diagnosis of the nature of single thyroid nodule.
中文: 论：B超、甲状腺同位素扫描、细针穿刺细胞学活检及X线检查有助于甲状腺单发结节性质的鉴别诊断。
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英文: The Use of Radioisotope Scanning in the Diagnosis and Differential Diagnosis of Carcinoma of the Liver
中文: 放射性同位素扫描术在肝癌诊断和监别诊断上的应用
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