Along the leg, there is a center line that runs from the top front to the top back.

沿着腿，有一个中心线，从正上方运行顶端回来。

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As soon as I cross over the top of show center and get to about the 500-foot line from looking down, I come all the way back on the stick to get to about seventy-five degrees nose high.

就在我飞过展览中心的上空、回头看到地面上的500英尺标线时，我用力把驾驶杆向后拉到底，使飞机的仰角达到75度。

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In the process of the reconstruction, the filtering line, re-sampling, correction and back-projection are revised respectively according to the detector center excursion.

在重建过程中，根据探测器的中心偏移量，对滤波线方程、滤波前后的重排和校正以及反投影过程进行修正处理。

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Filip Kuba banked the puck off the boards to center ice, but one of his teammates inadvertently nudged it back toward the Florida blue line.

WSJ: Zajac sets up 2, Brodeur has 17 saves for Devils

Davis was up next, and he did well to keep his hands back on a breaking ball and hit a line drive the other way to left-center for a single.

WSJ: Mets lose to Braves when suspended game resumes