Backup system
[电] 后备系统
🧩 词语组成解析
backup
['bækˌʌp]
n. 支持，后援;阻塞;<计>备份文件;[乐]伴奏;
adj. 备用的，后补的;支持性的;伴奏的;
🗣️ 情景例句
Are you feeling better?
你觉得好些了吗？
How long has it been since you've heard from your uncle?
自从你听到叔叔的消息有多长时间了？
Of course, New York is the ideal place for such an interesting study, because there is no shortage of tall buildings.
当然，纽约是进行这种有趣的试验的一个理想的地方，因为那里根本不缺乏高楼大厦，有的是高层的窗槛从上往下坠落。