词族 · pitchblende
词形变化
英语词源
- pitchblende (n.)
- also pitch-blende, 1770, a loan-translation of German Pechblende; see pitch (n.2) + blende.
权威例句
- 1. Pitchblende and chalcolite are much more radioactive than uranium itself.
- 沥清铀矿和铜铀云母比纯铀的放射性强得多.