文章内容为扇贝六条英语俚语总结内容，并对其进行造句。

1、a flash in the pan :

the 2019nocvs, the new virus broken in the end of 2019，have killed hundred of peoples in China and have been spread among the world .but we trust it only the flash in the pan .

2、rub one's nose in it :

for my briefs was brokened ,so I was rubed my nose it it by my mother to blame I haven't the conscious of clean . 

3、under a cloud:

just a few days ago ,an Indian research group published a paper shows that the novel  coronavirus is changed by the SARS virus .it made the group under a cloud 

4、water under the bridge :

the felling about your  ex-girlfriend isn't the water under the bridge for you ? 

5、toe the line :

staying at home and reducing  the time go to the outside is everyone must to toe the line among the coronation spreading time .

6、go up in a smoke :

technology bring us  convenience and take peoples out from some heavy and dangerous work such as AI ,but there out to be a alarms in our ear ,couldn't human civilization may  be go up in a smoke by technology ?