backup
/ˈbækʌp/📚 5539 1四级六级托福Backup consists of extra equipment, resources, or people that you can get help or support from if necessary. 后备 (设备、物资或人力)
noun [具体名词]支援，增援；备用品，后备；备份；伴唱，伴奏；堵塞
There is no emergency back-up immediately available.
没有立即就能获得的后备。
adjective [原级]候补的，替代的；支持性的
If that happens, the grasshopper has a backup defense.
如果发生这种情况，蚱蜢就有了后备防御。
I have completed the backup. 完成备份(backup不是动词)
单词造句:
- 网友用“Backup”造句精选
- Every part of the system has a backup. 这套系统的每个部分都有备件。
- Sharon also sang backup for Barry Manilow. 莎伦还为巴里·马尼洛唱了伴唱。
- You should make a copy of the disk as a backup. 你应该将磁盘复制一个备份。
- In areas where the wind dies down, backup electricity from a utility company or from an energy storage system becomes necessary. 在风能不稳定的一些地区，需要供电事业公司或者能量储存系统来提供备用电能。