So precious is time that we can't afford to waste it. 时间是如此珍贵，经不起我们浪费。"这是一个so…that…结果状语从句的倒装句，用于强调和加强语气，正常语序应为Time is so precious that wecan't afford to waste it.。“So+形容词+be+主词+that…”表示“如此……以至于……”，首先是so+形容词，然后接be动词和要形容的事物，be动词应根据语境选择恰当的形式，that引导从句，表示“以至于”的内容。afford to意思是“负担得起，买得起”。can't afford to waste sth.意为“浪费不起某物”。句型拓展1. So moved was she that she could not say a word.
她激动得一句话都说不出。
2. So fast does light travel that it is difficult for us to imagine its speed.光速如此之快，我们很难想象。