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2. If a company allows employees to have fewer working hours, it is likely to hire more people in order to meet the normal levels of productivity. 如果一家公司允许员工工作更少的时间，那么这家公司很可能需要雇用更多的员工以达到正常的生产水平。
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同义 fertility（n. 生产力）
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projector［prə’ʤektər］n. 放映机，幻灯机，投影仪
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例句 1. In ancient times, it was nearly impossible for people to imagine things like an electric light and a movie projector. 在古代，人们几乎无法想象类似电灯或电影放映机这样的东西。
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2. Projectors have been widely used in class in numerous activities. 投影仪已经在大量课堂活动中得到了广泛的使用。
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radiation［ˌreidi’eiʃn］n. 放射；辐射；放射物
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搭配 solar radiation 太阳辐射；radiation therapy 放射疗法
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例句 1. Spending too much time playing computer game is harmful for your health since you are exposed to radiation and computers also can cause severe eye-strain. 花太长的时间玩电脑游戏对你的健康是有害的，因为你会暴露在辐射之下，而且电脑还会造成严重的眼疲劳。
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2. Because it often stays a long time in the intense tropical Sun, the grass mouse has evolved two separate safeguards to prevent themselves from the Sun’s ultraviolet radiation. 由于草鼠总是长时间待在强烈的热带阳光下，因此它进化出了两套安全措施以保护自己不受阳光紫外线辐射的影响。
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3. The energy of the quartz crystal will turn into infrared radiation when it is in a heater vibrating at a particular frequency. 当石英晶体在加热器当中以某个频率振动时，其能量就会转化为红外辐射。
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raw［rɔ
:］a. 生的；自然状态的；未经加工的
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例句 1. In order to send raw materials to the factory, many trucks are needed to drive through the streets where the children often play freely before, and the noise will disturb residents who live nearby. 为了把原材料运送到工厂，许多卡车就需要在这些孩子们曾经自由玩耍的街道上穿梭行驶，而噪音也会打扰居住在附近的居民。
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2. What is the requirement for the raw materials used to make this work according to the designer? 设计师对用于制造这一作品的原材料有什么要求？
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reptile［‘reptail］n. 爬行动物，爬虫类；卑鄙的人
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例句 Dinosaurs were different in many ways from modern reptiles, and the most convictive evidence is that dinosaurs were endotherms. 恐龙在许多方面都与现代的爬行动物不同，而最具说服力的观点是恐龙是恒温动物。
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resistant［ri’zistənt］a. 抵抗的，有抵抗力的；抗…的
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搭配 be resistant to 对…有抵抗力；acid resistant 抗酸的
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例句 1. The scientists aimed to develop more pest-resistant crops which are genetically designed to be unattractive to pests. 这些科学家的目标是研制一种更加抗虫的庄稼作物，这种作物从基因上就具备不吸引害虫的特点。
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2. Scientists found there are a number of damaging insects that are resistant to pesticide. 科学家们发现有许多害虫对杀虫剂具有抗药性。
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resonance［‘rezənəns］n. 共振；共鸣；回声
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例句 1. In a live performance, you will find yourself among a group of people who are indulged in the same interest and you can share your thoughts with them, but this kind of resonance is seldom sensed in our daily life so it is a sufficient reason for you to attend a concert or a game. 在一场现场表演中，你会发现自己身处为同一件事情陶醉的人群之中，而且你可以与他们分享你的想法，但我们在日常生活中却很少能够感受到这样的共鸣，因此这就是现场观看演唱会或体育比赛的一个足够充分的理由。
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2. The musical tone of an electric guitar is created by electronical amplification, instead of by the resonance of the body of the guitar. 电吉他的乐音是靠电子扩音器产生，而不是靠吉他本身的共振产生的。
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retrieve［ri’tri
:v］v. 重新找回（得到），取回；检索
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例句 1. Information can be stored into the information highway and be retrieved only in programming languages. 只有以汇编语言的形式才能将信息存储在信息高速公路之中并被重新找回。
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2. However, if you forget to retrieve your card after operating on the ATM, others may withdraw all your money in your account. 如果你在自动柜员机上操作后忘记取回你的卡，别人就可能会把你账户里的钱都取走。
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