Vending machines are often out of order,hawkers with pushcarts can't keep drinks cold enough,and the friendly mom-and-pop corner stores just stores just don't cut it with teenagers trying to act hip.

参考译文：自动售货机经常失灵/出现故障，带着手推车的街头小贩们不能让饮料足够冷，友好夫妻经营的街角商店没法迎合努力想扮时髦的青少年。

重点短语解析如下

【1】vending machines 自动售货机

【2】 out of order 出故障/失灵

【3】hawkers with pushcarts 带手推车的小贩们

【4】cut it 做成某事；胜任某事；达到预期；符合标准

【5】mom-and pop 夫妻经营的

【6】corner stores 街角商店

【7】cut it with sb达到某人预期/迎合某人【with 表示达到某人预期/胜任某人】

【8】teenagers trying to act hip努力想扮时髦的青少年【trying to act hip为现在分词作定语，修饰前面名词teenagers】

【9】act hip 扮时髦【hip 为形容词：时髦的，赶时髦的】