名词
中文翻译：同位素线
同义词：
['isotope line', "isotopic line例句：1. The isochronal line is a crucial tool for studying the Earth's history.（同位素线是研究地球历史的关键工具。）"]
例句：
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1. The isochronal line is a crucial tool for studying the Earth's history.
同位素线是研究地球历史的关键工具。
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2. The isochronal line was used to determine the age of the ancient city.
同位素线被用来测定古老城市的年代。
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3. The isochronal line is an important factor in determining the composition of the Earth's crust.
同位素线是确定地球地壳组成的一个重要因素。