4. beforehand ad. 预先,事先
be beforehand with 预先(提前)
Get everything ready beforehand.
事前将每一切事都准备好。
5. racial a. 人种的;种族的
racial prejudice 种族偏见 racial equality 种族平等 racial discrimination种族歧视
He went on record as opposing racial discrimination.
他公开表示反对种族歧视。
6. radiation n. 放射物,辐射
radiation sickness 辐射病 gamma radiation 伽马射线
Radiation reached unheard-of levels.
辐射作用已达到前所未有的程度。
7. radical a. 根本的;激进的
These developments have effected a radical change in social life.
这些发展使社会生活发生了根本变化。
A radical critic of society has turned into a High-Church reactionary.
一个激进的社会批评家变成了高教会派的反动分子。
8. range n. 幅度,范围 v. (在某范围内)变动
His reading covers a wide range of subjects.
他阅读的书籍涉及多种学科。
Our conversation ranged over many topics.
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