解读：不劳而获、投机取巧所得快乐转瞬即逝，唯有持续付出汗水与心血，攻克难题、实现目标，由此产生的快乐才扎实、长久，激励踏实奋斗。

I don’t like to be limited. I like to explore.

The beauty of mathematics lies not in its complexity but in its simplicity and the way it reveals hidden truths.

The sustainable development of the coal industry requires the coordinated efforts of policy, technology, and the market.

The desire to be a servant had been bred into me: bone, blood, and skin.

他让自己被一种信念所左右，即人类并非在母亲生下他们的那一天就一劳永逸地诞生了，而是生活迫使他们一次又一次地重生自己。