If you look first at the behavior of the fly on the right, you can see that whenever it reaches the midpoint of the chamber where the two odors meet, it marches straight through, as it did before.
如果你先看它們的行為 右邊的果蠅 你可以看到，當它到達室的中心點 兩種氣味的交匯處 它會一直走過去，就像從前一樣