上一个的英文：
last
prior
previous (=prev)

We need to traverse the last century thoroughly.
我们需要详细研究上一个世纪。

The old man is a survival of the past age.
这老人乃上一个时代的遗老。

A new factor of significance in the market is the volume of funds from abroad that is being invested.
当前股市上一个新的重要因素就是外来投资的大量增加。

An experimental solar lighting system in an above-ground cupola follows the sun with moving plastic mirrors
在地面上一个钟形阁楼里的试验性太阳照明系统用移动的塑料镜跟踪太阳。

I do applaud your spirit, Valentine, and think you worthy of an empress’ love.
我很佩服你的胆量，凡伦丁，你是配得上一个女皇来爱的。

Another milestone for our strategic presence in the enormous, up-and-coming China market in the new millennium.
也是踏入新世纪，我们在这迅速崛起、潜力无可限量的中国大陆市场的策略性发展上一个重要的里程碑。

There Baumbich found a photograph of a chubby toddler opening a treasure chest -- out of which flew butterflies.
在那儿，她看到了一张照片，照片上一个胖乎乎的小孩正打开一个珠宝盒，从盒子中飞出了蝴蝶。

There's virtually none left.
实际上一个都没剩.

The coach breasted a slight incline.
马车上一个缓坡。

outvie each other in study
在学习上一个胜过一个

The offer is subject to prior sale.
该报盘以未售出前为准。

I appreciate that you may have prior commitments.
我体谅你可能事先已另有承诺。

I believe that theories are prior to observations as well as to experiments.
我认为理论先于观察，也先于实验。

You are a little previous in learning English.
你在学习英语上有点过急。

He was judging by previous dinners.
他是照从前吃过的晚饭来猜测的。

the indiscriminate policies of the previous administration.
前任内阁令人困惑的政策