1. Longitude: The geographical longitude of your observing site. 地理经度：你的观测地点的地理经度。
2. One disadvantage of the longitude/latitude representation is that you need to be careful about the edge conditions near the poles and near +/- 180 degrees of longitude. 使用经度/纬度表示的缺点是你需要在经度接近极区和 +/- 180 度的时候主意边界条件。
3. The line passing through the (former) Royal Observatory, Greenwich (near London in the UK) has been chosen as the international zero-longitude reference line, the Prime Meridian. 穿过格林威治（前）皇家天文台（在伦敦附近）的经线被作为国际零度参考经线，或称为本初子午线。
4. People uses 4 decorative thread commonly on metope previously: The shade horn line, line that hang lens (picturesque scene line) , lumbar line and the line that play a base. 以前人们在墙面上一般采用四道装饰线：阴角线、挂镜线（画镜线）、腰线和踢脚线。
5. We supply all kinds of steel mill finish line equipments such as slitting line , recoil trimming line, tension level line , cleaning line, steering equipments for EPC and CPC. 本公司承制冷轧钢厂各式各样生产设备，如：分条机，清洗机，修边机，钢带纠偏机（EPC，CPC），张力整平生产线，钢带重捲生产线。
