But the clipping, the abbreviated form, is very recent - I've only heard that since the 1980s.

但是，这个词的缩略形式却是最近才有的，是从20世纪80年代才开始被使用的。

I would say in general that there's a trend to get rid of the period after the letters in an abbreviated form of a word.

我想说的是，一般来说，有一种趋势是在单词的缩写形式中去掉字母后的句号。

So, " I was" , and if we follow the abbreviated form here, " I wasn't" , " I wasn't invited to -" oh, then we can mention Jack, if you like, " to the party" , or " to Jack's party" .

所以，“I was” ，如果我们在这里使用缩写形式，“I wasn't” ，“I wasn't invited to-” 哦，如果你愿意， 我们可以提到杰克，“参加聚会” ，或“参加杰克的聚会” 。