A broken blue line means the course of a waterless valley.

蓝色虚线代表无水流过的山谷走向。

《柯林斯英汉双解大词典》

There is a sound of distant reapers, and yonder rises a blue line of cottage smoke against the woodland.

远处传来收割庄稼的声音，远处背靠树林的村舍那里升起一缕青烟。

youdao

That beautiful thin blue line is what makes our home so special in the cosmos.

正是那道美丽的蓝色线条使得我们的家园在太空如此的与众不同。

youdao

Roger, Strong-arm!Be advised we have incoming from the tree line at point blue plus two!A.K. s and rockets!

VOA: standard.other

Congratulations again to those that did well and let's do what we can to get everybody over to the right of that blue line.

再次鼓励那些取得好成绩的同学,让我们做我们能做的来让每个人,过及格线。

麻省理工公开课 - 固态化学导论课程节选

What I did in this diagram is I computed the efficient portfolio frontier-- now it's the blue line with three assets.

在这张图表中,我计算了有效边界-,蓝色线表示三种资产的组合。

耶鲁公开课 - 金融市场课程节选

Malkin sent a pass from blue line to blue line to Kunitz, who streaked in alone on Nabokov and snapped a shot inside the right post at 13:37.

NPR: Kunitz's 2nd PP Goal Gives Pens OT Win Over Isles

The thin blue line was black and blue that day.

NPR: Who Wants To Be New Orleans Mayor, Anyway?

The orange line plots earnings, the dark blue line shows the historical normal PE ratio applied by the market, and the light blue shaded area reflect dividends paid out of earnings.

FORBES: Target Corp Offers Solid Value And An Above Market Yield