new
tracer (element)的英文翻譯是什么意思,詞典釋義與在線(xiàn)翻譯:
英英釋義
名詞 tracer:
-
an investigator who is employed to find missing persons or missing goods
-
an instrument used to make tracings
-
(radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
-
ammunition whose flight can be observed by a trail of smoke