return "rgb({c.r}, {c.g}, {c.b})";
Tugboat powered by ammonia sails for the first time, showing how to cut emissions from shipping，更多细节参见新收录的资料
Who is Turkish opposition leader Ekrem Imamoglu?。新收录的资料是该领域的重要参考
"The international community is working hard trying to set standards and new regulations, but space commerce is changing faster than we can keep up," he added.，推荐阅读新收录的资料获取更多信息