成功交易的关键是知道何时买入和何时卖出。
The key to successful trading is to know when to buy and when to sell.
永远不要停止学习，因为生活永远不会停止教导。
你不能回头看，你只能把过去抛在脑后，在未来找到更好的东西。
The invention of the cotton gin was the result of necessity and observation.
The success of an enterprise depends not only on technology but also on a deep understanding of the market and quick responses.
史记