| 释义 |
tracerBrE /ˈtreɪsə(r)/NAmE /ˈtreɪsər/ nouna bullet or shell (= a kind of bomb) that leaves a line of smoke or flame behind it 曳光弹(specialist) a radioactive substance that can be seen in the human body and is used to find out what is happening inside the body 示踪剂 |