男女羞羞免费视频_日韩看片网站_不卡av一区二区_天天干中文字幕_波多野结衣亚洲色图_久久青青国产

3325英語網 單詞

pyrotechnic的意思

pyrotechnic

英 [,pa?r?(?)'tekn?k] 美 [,pa?r?'t?kn?ks]
  • adj. 煙火的;令人眼花繚亂的;出色的

pyrotechnic

中文詞源


pyrotechnic 煙花

pyro-,火,-technic,技術,詞源同technology.

英文詞源


pyrotechnic
pyrotechnic: [18] The Greek word for ‘fire’ was pūr (it came from the same prehistoric Indo- European source as English fire). It underlies a range of English words, including pyracantha [17] (etymologically ‘fire-thorn’), pyre [17], pyrethrum [16], and pyrites [16]. Pyrotechnic itself was derived from an earlier pyrotechny, which was originally used for the ‘manufacture of gunpowder, firearms, bombs, etc’. The application to ‘fireworks’ did not emerge until the 17th century.
=> fire, pyre, pyrites
pyrotechnic (adj.)
1704, "of or pertaining to fire;" 1825, "of or pertaining to fireworks," from pyro- + Greek tekhnikos "made by art," from tekhne "art" (see techno-). Figurative use attested from 1847. Related: Pyrotechnical (1610s, from pyrotechny "use of gunpowder," 1570s).

雙語例句


1. A method for determination of perchlorates content in pyrotechnic compositions was established.
目的〕研究建立測定煙火藥劑中高氯酸鹽含量的方法.

來自互聯網

2. A pyrotechnic its frequent than find another pyrotechnics.
與其流連一場煙火,不如尋找另一場煙火.

來自互聯網

3. Over - loading of strong flash pyrotechnic composite was studied by using drop hammer simulation device.
采用大落錘沖擊裝置模擬研究了強閃光煙火藥的過載能力.

來自互聯網

4. A new kind of pyrotechnic agent above regularities manufactured and compared with exiting pyrotechnic agent.
通過選擇最佳粒徑的材料,制備出新型發煙劑,并與目前使用的發煙劑產品作了比較.

來自互聯網

主站蜘蛛池模板: 日韩国产精品一区二区 | 欧美区日韩区 | 国产无套丰满白嫩对白 | 热久久精品| 午夜精品福利视频 | 高清一区二区三区四区 | 国产精选视频 | 一区二区三区免费在线视频 | 狠狠干2019 | 肢体的诱惑在线观看 | 久久婷婷av | 国产一级18片视频 | 国产成人精品视频 | 毛片一级在线观看 | 欧美成人福利视频 | 国产毛片a | 国产三级精品视频 | 四虎8848精品成人免费网站 | 欧美日韩免费在线 | 精品在线播放视频 | 国产三级小视频 | 久久久久婷婷 | 欧美日韩一二三 | 国产婷婷一区二区 | 亚洲免费大全 | 亚洲精品久久久久久久久久久久久 | 久草国产精品 | 国产视频在线免费观看 | 太久av| 五月婷婷六月婷婷 | 久久精品视频免费看 | 免费一级黄色大片 | 欧美国产日韩在线观看成人 | 中文天堂在线观看 | 99热久| 九色视频91 | 国产精品va | 国产91精品在线观看 | 久色成人网 | 高清久久| 看av在线 |