THE roots of algebra, asJohn Derbyshire tells us, go back to the ancient world: the Babylonians leftcuneiform tablets showing simple algebraic problems.
代数学,据约翰·德比夏尔所说,可以追溯到古巴比伦人留在楔形文字石碑上的简单的代数问题.
When your dog obeys a simple request of "come here, sit", it is showing obedience and respect for you.
你的狗服从一个简单的“过来,坐下”的指令,这是它对你表示服从和尊重。
Here's a simple example showing it's not true.
有一个简单的例子证明这不是真的。
It's a very important point, if you see the very simple math that I'm showing up here.
这一点要特别注意,看看这个简单的数学表达式。
Here's a simple example showing it's not true.
有一个简单的例子证明这不是真的。
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