前缀a- , 不，非。typical，典型的。

1. The economy of the province was atypical because it was particularly small.

该省的经济比较特殊，因为它的规模特别小。

2. He was an atypical English schoolboy.

他跟一般的英国男学生不太一样。

3. Relative to atypical antipsychotic use, conventional antipsychotic use was associated with a higher risk for death at all time points.

相对于非标准运用抗精神病药物而言, 传统的抗精神病药物运用在各个时间点上均与死亡高风险性相关.

4. You have taken an atypical case. It does not prove anything.

你举的例子不是典型的, 它不能说明什么.

5. The source tree must be isolated and growing under atypical conditions.

来源树是孤立和生长在非典型条件下.