翻譯：
    Therefore,with every increase of knowledge and skill,wisdom becomes more necessary,for every such increase augments our capacity for realizing our purposes,and therefore augments our capacity for evil,if our purposes are unwise.
    【妙譯】因此，隨著知識(shí)和技術(shù)的增加，更加需要智慧，因?yàn)橹R(shí)和技術(shù)的每一次增長(zhǎng)都會(huì)增強(qiáng)我們到達(dá)目標(biāo)的能力，當(dāng)然如果我們不智慧，也能增強(qiáng)我們作惡的能力。
    【點(diǎn)撥】該句為一個(gè)復(fù)合句，其主干為“wisdom becomes more necessary”。With引導(dǎo)的短語(yǔ)構(gòu)成伴隨狀語(yǔ);for 在本句中引導(dǎo)原因狀語(yǔ)從句，在該句原因狀語(yǔ)從句中，包含一個(gè)由if引導(dǎo)的條件狀語(yǔ)從句。
    1.The road of life is long,but only a few steps are crucial especially during some years_______(當(dāng)人年輕的時(shí)候)
    2.April Fool’s Day is that special day of the year______(在這一天你可以捉弄?jiǎng)e人)
    1.when people are young
    【解析】該題考察when 引導(dǎo)定語(yǔ)從句的用法。when 在定語(yǔ)從句中充當(dāng)時(shí)間狀語(yǔ)，相當(dāng)于“in which”
    2.when you should play a joke on someone
    【解析】該題考察when 引導(dǎo)的定語(yǔ)從句。When只能對(duì)that special day of the year這類(lèi)表示時(shí)間的名詞進(jìn)行修飾。