In the first of the two tragic events, survivors report the boat capsized early Saturday night when the smugglers began to push passengers over board into the waters off the coast of Yemen.
VOA: standard.2009.09.01
That's, there are whole courses on that, there's some great courses here on that, it takes some mathematical sophistication, we're going to push that off a little bit.
有一些课程是专门讲这个的,那些课一般都涉及,一些复杂的数学问题,我们只是简单的讲一些基础知识。
Can't my mind take off from there and push straight ahead to the idea of the perfectly straight, even if I never have encountered it before?
即使我之前没有直接碰到过,难道我的心灵不能借此来推断出,完美的直线是什么样子的吗
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