VOA慢速英语:Who Wants to Be an Astronaut?

词汇讲解：
 
1. description n.描述; 形容
例句：He doesn't answer to the description of the missing man that appeared in the newspapers.
他与报纸上所描述的失踪的人不相符。

2. join vt.参与; 结合
例句：Come and join us for lunch tomorrow．Please say yes！
明天你过来和我们一起吃午饭吧。

3. biology n.生物学; 生物
例句：He taught himself the alphabet of biology.
他自学了生物学的基础知识。

4. professional adj.专业的; 职业的; 专业性的
例句：A lawyer is a professional man.
律师是从事专门职业的人。

5. accept vi.承认; 同意; 承兑
例句：Accept my sincere professions of regard.
请接受我真诚的致意。