筹夷事必知夷情，知夷情必知夷形。
筹划洋人的事情一定要先了解洋人的情况，要了解洋人的情况一定知道洋人的情况。
To make something good， just do it. To make something great， just re-do it， re-do it， re-do it. The secret to making fine things is in remaking them.
我不认识她。
Sustainability must be the cornerstone of modern quarry operations, not an afterthought.
On earth there is nothing great but man；in the man there is nothing great but mind.