Warning: file_put_contents(/www/wwwroot/ppbbbu/202081.com/cache/5a366016572c6333ae4b0edd13276e45.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/202081.com/index.php on line 55 back pack英英字典_back pack剑桥英语解释_back pack柯林斯英文解释_2020年的事情英文词典
1. N-COUNT A backpack is a bag with straps that go over your shoulders, so that you can carry things on your back when you are walking or climbing. 双肩包