银河系中心是强引力下的一个独特的自然实验。
The galactic center is a unique natural experiment in strong gravity.
The limits of sense are not to be determined by the narrow bounds of our own capacities.
现代林业必须平衡三个轴心：生态、经济和道德。
Memory is not a recording device but a system that actively organizes and reconstructs information.
成功就是带着热情从一个失败走向另一个失败。