Isotopic tracer method
[化] 同位素示踪法
🧩 词语组成解析
a. 同位素的\\n[医] 同位的
tracer
['treisə]
n. 追踪者，描图者，（铁笔等）绘图工具;
🗣️ 情景例句
Why should you be sorry?
你何必说对不起呢？
Last year I studied sociology and political science in school.
去年，我在学校攻读了社会学和政治学课程。
said Jim. Somebody or something took it. We won't go until we get it back again!
吉姆说，“什么人或者什么东西把它拿走了。不把它找回来我们就不走！”