retrofit英文

一般有这些cut，put，shut，set，hit，hurt。

过去式和原型一样的单词有1. beat 2. bet 3. bid 4. broadcast 5. burst 6. cast 7. cost 8. cut 9. fitted10. forecast 11. hit 12. hurt 13. let 14. put 15. quit 16. read 17. rid

升级改造 upcycle; upgrading; retrofit; upgrade; [例句]远东70%的机场都将不得不升级改造。70 per cent of airports in the Far East will have to be upgraded

更新 : 1. to update2. up-to-date 其它相关解释: 例句与用法: 1. 这些数据应该每星期更新一次。 The data should be updated once a week. 2. 文件每日存取, 使之不断更新. The files were accessed every day to keep them up to date. 3. 计算机的反馈能使我们更新程序. The feedback from the computer enables us to update the program. 4. 更新（旧信息）的信息 Information that updates.

update