地质学是研究自然界有机和无机领域连续变化的科学。
Don't let anyone dull your sparkle.
The world owes all its onward impulses to men ill at ease; the happy man inevitably confines himself within ancient limits.
文章贵在简洁,简洁则明了;贵在真实,真实则贴切;贵在变化,变化则生动。
在这种状态下,没有工业...而且最糟糕的是,持续的恐惧和暴力死亡的危险。
The sidelines are not where you want to live your life. The world needs you in the arena.
Our quarries don't just produce stone - they produce opportunities.