For every dollar you spend purchasing something substantial， expect to pay a dollar in repairs， maintenance， or disposal by the end of its life.

科学进步必须以道德指南针为指导。

The greatest power is not in controlling others, but in understanding them.

强调持续进步的重要性。

Great leaders are willing to make the tough decisions that others avoid.

人生最好的老师就是经历。

Think wrongly, if you please, but in all cases think for yourself.