Translation of "outer" into Chinese

We can ill afford an arms race in outer space at this juncture of human history.

在人类历史的这一紧要关头,我们不能在外空进行军备竞赛。

The flexible, convoluted outer feature of your ear is called the pinna.

人耳朵最外面的一部分叫耳廓,外形凹凸不平,具弹性。