开场白 When you can measure what you are talking about and express it in numbers you know sth about it, but when you cannot, your knowledge is of a meagre and unsatisfactory kind: it may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the state of Science 如果你能用数字定量地说明你讲的东西时, 这表示你对这一事物确有所知,但如果你不能这 样做时,则说明你的知识贫乏和不能令人满意 它可能是知识的开端,而在你的思想中还几乎没 有进入科学境界。 Lord Kelvin(开尔文)ᔶ൰ⲳ ྸ֖᷒㜳⭞ᮦᆍᇐ䠅൦䈪᱄֖䇨Ⲻђ㾵ᰬ, 䘏㺞⽰֖ሯ䘏жӁ⢟⺤ᴿᡶ⸛, ռྸ֖᷒у㜳䘏 ṭڐ ,ᰬࡏ䈪᱄֖Ⲻ⸛䇼䍡҅ૂу㜳ԚӰ┗ᝅ; ᆹਥ㜳ᱥ⸛䇼Ⲻᔶㄥ, 㙂൞֖Ⲻᙓᜩѣ䘎ࠖ҄⋗ ᴿ䘑ޛ〇ᆜູ⮂Ⱦ ——Lord Kelvin(ᔶቊᮽ) 7 “When you can measure what you are talking about and express it in numbers you know sth. about it, but when you cannot, your knowledge is of a meagre and unsatisfactory kind: it may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the state of Science