你好！
1. You can't get smething you missed back.
2. Please clean up the room before they come.
希望可以帮到你。
1. It's difficult to make up for the knowledge you missed.
2. Clean up the room before their visit
落下的知识很难补回来 2、在他们来访把屋子打扫干净
it's difficult to make up for the course left behind
clean up the house before their arrival
1.Fall of the knowledge is very difficult to come back
2.In their visit to clean the house
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024