It is said that three geologists asked the same question will come up with six different theories, each keeping one as a spare. This is because so much about nature is unfathomable.
人家說「三個地質學者，有六套地質理論，每個人都有一套備用的」，因為大自然瞬息萬變，人類心智與科技實在難以捉摸。