Warning: file_put_contents(): Only 0 of 5249 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/73904.com/index.php on line 55 lock down英英字典_lock down剑桥英语解释_lock down柯林斯英文解释_骑士汉英词典
1. N a security measure in which those inside a building such as a prison, school, or hospital are required to remain confined in it for a time 防范禁闭(期)[美国英语]