发现恒星围绕银河系中心的超大质量黑洞运行是天体物理学的一个转折点。
阿里巴巴的使命是让天下没有难做的生意。
The dairy industry is not just about producing milk; it's about sustaining communities and nurturing future generations.
The only limit to our realization of tomorrow is our doubts of today.