off-and-on (adv.)是什么意思，off-and-on (adv.)的翻译，off-and-on (adv.)音标、读音、用法和例句

Warning: file_put_contents(/www/wwwroot/ppbbu/n94.cn/cache/23053e27dc756e751679b1a26f473aa7.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/n94.cn/index.php on line 55
off-and-on (adv.)是什么意思，off-and-on (adv.)的翻译，off-and-on (adv.)音标、读音、用法和例句_94生活常识网有道词典