isotopic tracing的用法和樣例：
例句
- The isotopic tracing technique is an advanced method in the research of photosynthesis of plants.
摘要同位素示蹤技術是進行植物光合作用研究十分有效的手段。 - In recent years lead isotope tracing has been playing its unique role in studying the source and migration of heavy metals in soil.
近年來鉛同位素示蹤在研究土壤中相關重金屬來源及其運移途徑起到獨特的作用。
