launchings中文什么意思

例句与用法

1. sadly, some amateur launchings end in tragedy ? and there is frequent talk of a private firework ban
   不幸的是，外行放焰火有时会造成悲剧??而且经常有人说要禁止私放焰火。
2. known launchings accounted for only220 of the973 new objects that were sent up from earth into space that year
   那一年从地球向太空发射了九百七十三个物体，而公开的发射次数却只有二百二十次。