a发音一样，都发/æ/音。He traced the route on the map.

他在地图上勾画出了路线。

Are you any good at map reading?

你会看地图吗

I'm trying to read the map.

我正看地图呢。

The map wasn't much help.

这张地图没多大用处。He often wore a baseball cap.

他经常戴顶棒球帽。

She screwed the cap back on the jar.

她又把广口瓶的盖子拧上。

He wears a cap to cover a spot of baldness.

他戴一顶帽子来遮住一小块秃顶。