The coal industry must evolve to meet modern environmental standards, or it will become obsolete.
SINCERITY. Use no hurtful deceit; think innocently and justly, and, if you speak, speak accordingly.
诚恳：不要恶意欺骗人，思想纯洁公正，讲话也是如此。
一场展览应该让观众发生转变。
You have to keep moving forward, no matter what.