Since they can and do successfully inter-breed, they cannot be classed as different species.
既然它们能够而且确实可以成功杂交繁殖，它们就不能被归为不同的物种。
But it would be a dumb thing to do it since it can be done so much easier.
但是这么做挺傻的，因为它明明可以用更简单的方法做。
Since for now you have chosen to be in the job you are in, it is up to you for the time being to make the most of what you do.
既然现在你已经选择了从事这份工作，那你就应该尽力做到最好。
Since many of you are planning to study at a college or university in this country, you may be curious to know what a typical college course is like. What can you expect to do in typical week?
因为你们大部分人打算在这个国家的学院或大学里学习，你们可能好奇地想知道，什么是典型的大学课程。
And since they do not have enough money to hire people, the work will simply not be done.
由于没有足够的钱来雇工，这些工作难以进行。
What shall I do in future? My wish is to be a middle school teacher. I have had this dream since I was only a child.
我将来想干什么呢?我希望将来当一名中学教师，我自小就树立了这个理想。
What shall I do in future? My wish is to be a middle school teacher. I have had this dream since I was only a child.
我将来想干什么呢?我希望将来当一名中学教师，我自小就树立了这个理想。
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