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1. explode vi.爆[突]发，发怒
例句：Many boys explode firecrackers on the Lantern Festival. 
许多男孩在元霄灯节燃放鞭炮。 

2. tenuous adj.薄的，细的; 精细的
例句：Cirrus clouds are often thin and tenuous. 
卷云十分稀 

3. conduct vt. 引导; 带领
例句：She was appointed to conduct the advertising campaign. 
她被委派主持宣传活动. 

4. alternative adj.替代的; 备选的
例句：I have made my choice, I had no alternative. 
我已做出抉择，别无选择余地。 

5. expert n.专家，能手
例句：Configuration is a necessity for expert users. 
对于专家用户来说，配置是必需的。 

6. detect vt.查明，发现
例句：Attempts have failed to detect allantoicase. 
试图检测尿囊素酶没有成功。 

7. shelter n.居所; 避难所
例句：If you have time, seek shelter immediately.
如果有时间尽快去找更好的避难点。