你的自我价值由你自己决定，不必依赖别人来定义你是谁。
Your self-worth is determined by you. You don’t have to depend on someone telling you who you are.
If you borrow something， try to return it in better shape than you received it. Clean it， sharpen it， fill it up.
Innovation requires both courage and patience.
如果我们致力于正确的技术，可持续的煤炭行业是可能的。
艺术是一种以不同方式看待世界的方式。
The farmer's best implement is his mind.