不能去掉.
用于be动词后表示某人或某事物具有的特点或特性
例如:
Both world wars were of unquestionable importance as economic events.
两次世界大战都是重要性无可置疑的经济事件.
不能去掉.
用于be动词后表示某人或某事物具有的特点或特性
例如:
Both world wars were of unquestionable importance as economic events.
两次世界大战都是重要性无可置疑的经济事件.