日本三级无码啪啪区|午夜视频久久一区久久一|AAAAA一级黄片|日本久久99久久|国际精品AV在线|狠狠2015亚洲一区|美腿丝袜亚洲网站|欧美色多多人人看|国产超碰美女在线|www色色在线色

單詞乎

tracer

音標(biāo)['treis?]
tracer是什么意思、tracer怎么讀

tracer漢語翻譯

n. 追蹤者, 描圖者, 描繪工具
【計(jì)】 跟蹤程序
【化】 示蹤劑
【醫(yī)】 示蹤器; 示蹤物; 描記器

tracer英語解釋

名詞 tracer:

  1. an investigator who is employed to find missing persons or missing goods
  2. an instrument used to make tracings
  3. (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
  4. ammunition whose flight can be observed by a trail of smoke
    同義詞：tracer bullet
0
糾錯