前缀a-, 不，非。symmetric，对称的。

1. Most people's faces are asymmetric.

大多数人的脸不对称。

2. We have made no reference to asymmetric carbon atoms.

我们未曾涉及不对称碳原子.

3. Asymmetric 1, 3 - dipolar cycloaddition can be strongly catalyzed by chiral oxazaborolidines.

手性唑硼烷酮能够催化不对称1, 3偶极加成反应并取得很好的效果.

4. It mainly includes symmetric encryption algorithms and asymmetric cryptographic algorithms and protocols.

密码技术主要包括对称密码算法和非对称密码算法及协议.

5. Second, asymmetric control policy, China Mobile lost so what?

其次, 非对称管制政策, 使中国移动失去的是什么?