" Good, " said the professor, without reading them, " now set down those words in a horizontal line."

“好，”教授没有读它们，“现在把这些词写在一条水平线上。”

Then Breen goes to a spot in the recording where there's a horizontal line and he zooms in, so it's all that we can see.

然后 Breen 走到录音中有一条水平线的地方， 然后他放大，所以这就是我们能看到的全部。

If we draw a horizontal line through the spinal cord, the front half is the anterior or ventral half, and the back half is the posterior or dorsal half.

将脊髓横截面用横线分隔成前、后两部分，前半部分叫前侧或腹侧，后半部分叫后侧或背侧。