second-growth isotope

例句：

1. 1. The study of second-growth forests is crucial for understanding the impact of climate change on biodiversity.
   研究次生森林对于理解气候变化对生物多样性的影响至关重要。
2. 2.The team used a special technique to analyze the second-growth isotopes in the soil samples.
   该团队使用了一种特殊技术来分析土壤样本中的次生同位素。
3. 3. The researcher discovered that the second-growth isotope ratios in the plant matter were different from those in the nearby trees.
   研究者发现植物物质中的次生同位素比例与附近树木的不同。