The camera is like a weapon; it's dangerous if you don't know how to use it.
相机就像武器;如果你不知道如何使用它,它就很危险。
Collaboration across industries and borders is essential to meet the world's energy needs.
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。