教育的目的不是使年轻人在任何一门科学上都变得完美,而是要打开和培养他们的思维,使他们在将来学习任何科学时都能胜任。
模型最重要的不是其假设,而是其结论。
The mining industry has a responsibility to operate sustainably and ethically.
Ignoring isn’t the same as ignorance, you have to work at it.