没错，违约国家在出现违约之前一般被降低信用评级。

It's true that defaulting nations were generally downgraded before the event.

youdao

该男子在出现症状之前一个月期间无旅行史。

The man had no history of travel during the month prior to symptom onset.

youdao

该男子在出现症状之前一个月期间无旅行史。

The man had no history of travel during the month prior to symptom onset.

youdao