这里本来应该填的是which is known或者that is known这样的定语从句,意思是只有专业只是人员才懂的单词,词组或短语.现在省略掉which is ,用动词的完成式known做后置定语,
to be known或having been known用在这里既不符合语法,也不符合逻辑
这里本来应该填的是which is known或者that is known这样的定语从句,意思是只有专业只是人员才懂的单词,词组或短语.现在省略掉which is ,用动词的完成式known做后置定语,
to be known或having been known用在这里既不符合语法,也不符合逻辑