🧩 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 here on business or for pleasure?
你来这儿是出差还是游玩？
A change of work is as good as a rest.
调换一下工作是很好的休息。
He told him he had better return it or he would call the police.
告诉他最好把羊交还，否则就去叫警察。