neutral line的用法和樣例：
例句
- Don't trap him until he goes over the central line.
等他過了中線再夾擊他。 - And it's Moore to throw the ball in near the halfway line.
由穆爾在中線附近擲界外球。 - The meaning of the current account balance can be seen by comparing what is above the line with what is below it.
經常項目差額的含意可以通過對比線之上和線之下的項目看出。 - Especially, the adjacent tree graph and line graph are both included as special cases of our generalization.
特別，鄰接樹圖和線圖是我們推廣的特殊情況。
