这是因为，好听力不是一日练就的，它需要大量的实践练习。
This is because successful listening skills are acquired over time and with lots of practice.
可就象任何事情一样，在说好它之前你需要大量的练习。
But like anything else, you really need to practice and practice before you can do it well.
它主要由东方人练习，在美国人中未能大众化，这是由于它和其它的东方技艺一样，需要大量单调的训练和极大的耐心。
It was practiced principally by Orientals and did not gain much popularity among Americans because, as in all things Oriental it involved a tedious amount of practice and a great deal of patience.
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