中国台湾旅美老师今天交给我们的句子是：

They lowered the cost of admission and started earning more through their own concession stands, and so a custom was born.
他们降低入场费，开始从贩卖部赚取更多钱，于是，习俗就这样诞生了。

学习重点：

1.admission 入场费，门票费
admission (n.) 入场费，门票费

2.concession stand 贩卖部
concession stand (n.) 贩卖部

3.custom 习俗，惯例
custom (n.) 习俗，惯例