Radioactiv tracer
[醫(yī)] 放射性示蹤物
?? 詞語組成解析
tracer
['treis?]
n. 追蹤者，描圖者，（鐵筆等）繪圖工具;
??? 情景例句
Hello, Joanne. Nice to meet you.
好， Joanne。很高興見到 。
Let me go.
讓我走。
and they provided a striking demonstration of the potentialities hidden in instruments and apparatus.
并充分顯示出了儀表和儀器的潛在力量。