N any of various shellfishes, esp Plebidonax deltoides of Australia or Mesodesma novae-zelandiae of New Zealand 贝类动物(特指三角斧蛤)
我在我的车子里发现了皮皮。
In "PI PI lu", I said: If the kids of a nation talked like grown-ups, behaved like grown-ups, the grow-ups of this nation are most likely to talked and behaved like kids.
我在《皮皮鲁总动员》里说过:一个国家的孩子如果说大人话办大人事,这个国家的大人准说孩子话办孩子事。
Here we use [-pi: PI] to get one sinusoid cycle.
这里我们使用[- pi: pi]得到一个正弦曲线周期。
This is because most fraternities and sororities are named after a series of Greek letters, such as Alpha Delta Pi or Sigma Phi.
VOA: special.2009.09.25
So let's have a clicker question here on how many total pi bonds do you expect to see in benzene?
让我们来做个课堂习题,你们觉得苯环里有一共多少个π键?
Sorry, said that wrong, p1 radius 1 and angle 2, 2 radians is a little bit more than pi half.
而是半径和角度的表示,在这个例子中点,并不对应这个点,它实际上对应的是。
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