metaphor

“生活是一段旅程”是一个常见的比喻。

'Life is a journey' is a common ___metaphor.

我将用一个比喻来帮助我表达我的想法。

I shall use a ___metaphor to help me express my idea.

他的演讲充满了将生命比作旅程的隐喻。

His speech was rich with the ___metaphor of life as a journey.