I added a dollop of vanilla ice-cream to the pie.

我在馅饼里加了一块香草冰激凌。

...vanilla essence.

香草精

...just plain vanilla couples like me and Tony.

只是如我和托尼一样的平常夫妇

The tensions of the Nixon presidency were replaced by the plain vanilla administration of a friendly, middle-aged, middle-class man from the Middle West.

尼克松时代的紧张局面被一届平淡无奇的政府所取代，继任总统温和友善，正值中年，出身中产阶级，来自中西部。