台湾籍旅美老师今天交给我们的句子是：

Back in the days, new surnames were created as well based on someone's job or father's given name or where they came from. But that doesn't really happen anymore, not on a large scale, anyway. So more surnames are lost than new ones are being born.
曾经有段时间，姓氏也是经由被创造而产生，是根据人们从事的工作、父亲的名字，或是他们的家乡地。但是这种机制现在已不再适用了，至少大部分的人都不这样做了。因此，失传的旧姓氏比新冒出来的姓氏还要多。

学习重点：

1.surname 姓氏
surname (n.) 姓氏

2.base 以...为基础
base (v.) 以...为基础
base (n.) 基底

3.scale 刻度
scale (n.) 刻度

4.born 出生的
born (adj.) 出生的
birth (n.) 出生