1. radiation
Experts know that portable devices emit radiation, which affects those wavelengths which aircraft use for navigation and communication.(1999.6)
【全真测试】A. 阳光 B. 放射线 C. 激光
【译 文】专家了解到这种可便携的装置会辐射射线,这种射线会影响飞行器用来导航和和联络的波长。
【四级词义】n. 放射线,放射物,辐射
【猜 一 猜】① radical ② radiance ③ radiant
【Key】① adj. 放射的,辐射的 ② n. 发光,光辉 ③ adj. 发热的
2. racial
The racial discrimination issue was a political hot potato in the United States in the past.
【全真测试】A. 种族的 B. 饮食的 C. 卫生的
【译 文】过去,在美国种族歧视问题在政治上是个烫手的山芋。
【四级词义】adj. 人种的,种族的
【巧 记】race(种族;人种)rac + ial(形容词后缀)
【真题例句】racial pride 种族优越感
3. range
Studies over a range of illnesses, from depression to heart disease,reveal that the presence of social support helps people fend off(挡开)illness, and the absence of such support makes poor health more likely.(2000.6)
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