在过去

In order to make good use of the historical observational data,this paper suggests that the forecasting problem should be regarded as an inverse problem rather than an initial value problem.

进一步论证了数值模式的误差信息，也或多或少的隐藏在过去的历史数据中，为了充分使用过去的观测数据，本文建议改变问题的提法，不提成初值问题，提成反问题。

Some people stay in their past success and living in the long-gone glorious moments.

有些人因眷恋过去的成功而停滞，他总是活在过去的荣耀辉煌时期

As usual we have to look ahead: the past is the past and we can't change it.

像往常一样，我们必须向前看：在过去的已经过去，我们不能改变它。

Meanwhile, the rate of childhood obesity has tripled in the United States during the past 25 years.

同时，在过去的25年间，美国肥胖儿童的比例是过去的3倍。

In the last decades, advances in medical technology have made it possible for people to live longer than in the pas t.

在过去的几十年，先进的医疗技术已经使得人们比过去活的时间更长成为可能。

We use the simple past tense to talk about things in the past.

我们用一般过去时谈论发生在过去的事情。

Since you are talking of an event in the past, you use past tense.

自从你正在谈论一个事件在过去中，你使用过去紧张。

In the "finished" use , the past perfective denotes an action or state already in completion before a specific past.

过去完成体的"已完成"用法表示一个动作或状态在过去某时之前已经完成或结束。

In the past fifty years, ice radar has been widely applied to measure ice sheet thickness, internal structure and subglacial morphology. These parameters are fundamental for the calculation of ice volume and mass balance as well as the reconstruction of past snow accumulation and melting rates, ice dynamics and deposition process.

在过去的50年里，冰雷达被广泛用于测量冰盖厚度、内部构造和冰下地貌，这些参数是计算冰盖体积和物质平衡、重建过去冰雪积累和消融率以及冰盖动力和沉积过程的基础。

In the last decades, advances in medical tec**ogy have made it possible for people to live longer than in the past.

在过去的几十年，先进的医疗技术已经使得人们比过去活的时间更长成为可能。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。