1、The green line is the departure of actual NGDP from trend.
綠線表示實際名義GDP離開名義GDP的差距。

2、As the sun rose he saw other boats in toward shore, which was only a low green line on the sea.
太陽升起時，他看到別的一些船只都頭朝著海岸，在海上看來海岸象是一條接近地平線的綠帶子。

3、That is, by default a green line was covered and a red line was not covered.
也就是，默認條件下，綠色的行是覆蓋的而紅色的則不是覆蓋的。