重要
必要
imperative 英 [ɪm'perətɪv] 美 [ɪm'pɛrətɪv] adj. 必要的 n. 必要的事
联imperial adj. 帝国的
例
Job creation has become an imperative for the government.
创造就业机会是政府必须做的事。
prime 英 [praɪm] 美 [praɪm] adj. 首要的；第一流的
联premier n. 总理 adj. 最重要的
例
For several years now, tourism has been the prime source of foreign exchange in Nepal and Bhutan.
【C5，T4，R1】多年以来，旅游一直是尼泊尔和不丹的首要外汇来源。
primary 英 ['praɪm(ə)rɪ] 美 ['praɪmɛri] adj. 首要的
派primarily adv. 首要，主要
同foremost; dominant; elementary
例
That’s the primary reason the company’s share price has held up so well.
这就是那家公司的股票价格一直保持得这么好的首要原因。
essential 英 [ɪ'senʃ(ə)l] 美 [ɪ'sɛnʃl] adj. 必不可少的；本质的
派essence n. 本质
例
The first is to act as a ‘green lung’ for our planet, by means of photosynthesis, forests produce oxygen through the transformation of solar energy, thus fulfilling what for humans is the essential role of an immense, non-polluting power plant.
【C7，T3，R3】第一种功能是扮演地球的“绿色之肺”，通过光合作用，森林在太阳能量转化过程中释放氧气。对人类来说，它是一项不可替代的巨大而无污染的能量来源。
fundamental 英 [fʌndə'ment(ə)l] 美 [,fʌndə'mɛntl] adj. 基本的，根本的
记fund(a)（基础）+ ment（名词词尾）+ al（形容词词尾）→基础的→基本的
同cardinal; elementary; profound
例
But it differs from the study of written history in a fundamental way.
【C4，T4，R2】但它与有文字记载的历史研究有根本区别。 rudimentary ru.d..mentri adj. 基本的，初步的例
Rudimentary air traffic control (ATC) existed well before the Grand Canyon disaster.
【C8，T1，R2】基本的空中管制在大峡谷空难之前就已完备。
principal 英 ['prɪnsəp(ə)l] 美 ['prɪnsəpl] adj. 最重要的 n. 校长
派principle n. 原则
例
The removal of subsidies also stopped land-clearing and overstocking, which in the past had been the principal causes of erosion.
【C3，T2，R2】随着补贴的取消，开荒毁林和过度放牧等现象也终止了，这些过去是造成土壤侵蚀的主要原因。
意义
significance 英 [sɪg'nɪfɪk(ə)ns] 美 [sɪɡ'nɪfɪkəns] n. 意义；重要性同 importance
例
Through its collections, the Department’s specific interest is to document how objects are created and used, and to understand their importance and significance to those who produce them.
【C3，T3， R1】通过它的收藏品，这个部门的主要兴趣在于记录物品是如何创造并被使用的，并且来了解它们对生产者的重要性和意义。
Exercise 9
Ⅰ. 找出同义词。
doubtful arouse foremost meditationunbelievable dominant self-examinationelementary provoke reflection unimaginable stimulate evoke
primary
incredible
introspection
Ⅱ. 将单词改成正确的形式后，再把它们放到正确的位置。
1. pose You’ve an awkward question.
____________________________________________________
2. surprise He answered my question in a deep bass. ____________________________________________________
3. confuse Many people are about the new ways of measuring temperature.
____________________________________________________
4. forecast Now scientists can the weather accurately. ____________________________________________________
5. fundamental Fresh air is to good health. ____________________________________________________HOW
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