I don't think limits.

Life is like a song, with highs and lows, what matters is how you perform it.

The greatest education in the world is watching the masters at work.

The test of a man or woman's breeding is how they behave in a quarrel.

The best designs are those that solve problems without creating new ones.

采矿效率来自于持续改进，而不仅仅是重大突破。