英语翻译前文讲的是：我们考虑了数种插队买票的方法：雇人排队、从黄牛手里买票,或者直接从,比如说,航空公司或者游乐园处购买

英语翻译
前文讲的是：我们考虑了数种插队买票的方法：雇人排队、从黄牛手里买票,或者直接从,比如说,航空公司或者游乐园处购买插队的优先权.每一种这些交易方式替代了的排队的道德用市场的道德.下文如下：
Of course,markets and queues are not the only ways of allocating things.Some goods we distribute by merit,others by need,still others by chance.However,the tendency of markets to replace queues,and other non-market ways of allocating goods is so common in modern life that we scarcely notice it anymore.It is striking that most of the paid queue-jumping schemes we’ve considered—at airports and amusement parks,in call centers,doctors’ offices,and national parks—are recent developments,scarcely imaginable three decades ago.【The disappearance of the queues in these places may seem an unusual concern,but these are not the only places that markets have entered.】
我想知道的就是最后一句话的意思,能看懂意思,但是翻译出来之后看不懂汉语了,
1、重点解释 concern在句中的意思.
2、翻译【】里的句子,翻译完之后,最好解释一下汉语意思.不好意思,从汉语意思上,我也看过了,见笑了