Keep all your things visible in a hotel room， not in drawers， and all gathered into one spot. That way you’ll never leave anything behind. If you need to have something like a charger off to the side， place a couple of other large items next to it， because you are less likely to leave 3 items behind than just one.

自由的代价比镇压的代价要低。

Coal will remain part of the energy mix, but its role must be redefined for a cleaner future.

In mathematics, the journey from confusion to clarity is the most rewarding experience.

成功不仅在于你取得了什么，还在于你如何取得它。

Success is a series of small wins built over time.

I'm a big believer in 'to each his own.'

地理学首先是关于地方的科学，而非关于人的科学。