Let's bind z eh let's bind z to the-- f if I could type it would help-- say, f of 3. OK?

让我们给z赋值--如果我能打字就好了-,比方说？

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Ok. You definitely should go to take the F train to Bergen Street.

好的。你一定要坐F线地铁去卑尔根市街看看。

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