Around computers it is difficult to find the correct unit of time to measure progress. Some cathedrals took a century to complete. Can you imagine the grandeur and scope of a program that would take as long?
解释:手指粗于胳膊, 胳膊粗于大腿, 病情必然很重。
“物质”不是唯一的事实标准:还存在心理事实,而且无法以任何的物质方式来解释、证明、或辩驳它。