每个侦探都背负着自己的黑暗。

【讲解】：孝敬父母，尊敬长辈是做人的根本。

The true value of a forest cannot be measured in board feet alone.

Coal mining built modern Britain, and we must respect that heritage even as we transition to cleaner energy sources.

除非定理是美丽的，否则它们毫无价值。