5.by default
(through lack of competition)由于没有竞争
He has been promoted to the top job almost by default.他基本上是因为没人竞争才被提拔就任这一高层职位的。
6.to be in default
borrower +欠债不还
More and more borrowers are in default.越来越多的借款人拖欠所借款项。
The creditors haven't declared them in default.债权人尚未宣布他们拖欠欠款。