been的例句大全

The short-term training class has been run three times.

短训班 办了三期.

The short-term training class has been run two times.

短训班 办了两期.

Politics has been reduced to class struggle.

政治变成了阶级斗争。

A twinkling of an eye, 4-year career has been a thing of the past classmate.

光阴似箭,一转眼, 4年的同窗生涯已成为过去.

She's been married five times , so she should know a thing or two about men.

理解就是以一件事物所能被认识的程度去认识(约翰·多恩).

Obviously he had been predicting the wrong thing for his entire career.

很显然,他对他整个的球员生涯都预测错误.

His final purchase had been a pair of tennis shoes.

最后他买了一双网球鞋.

Paper has been found in Chinese tombs dating to the2nd century B.C.

公元前2世纪的中国古墓中就发现了纸。

Glue is an invention; it's been around since 4000 B.C.

因为胶是一项伟大的发明，它早在公元前4000年左右就已经出现了。

The concept of "science" has already been used since 7th B.C. As an ancient civilized country.

公元前七世纪已经出现了科学这个概念。

At the time of this article, none of the aforementioned widgets have been included in version 3 of YUI.

在撰写本文时，上述小部件都没有包含在YUI第三版中。

Spectral band replication ( SBR) is a novel technology, which significantly improves the compression efficiency of perceptual audio codecs. SBR has been chosen as Band Extension for MPEG-4 Version 3 audio standardization and now enjoys many applications.

频谱恢复（SBR）压缩技术能够极大地提高感知音频编码器的压缩效率，并且已成为MPEG-4version3的音频频谱扩展标准，在许多场合得到了应用。

Based on the catalytic effects of trace formaldehyde on the reaction between potassium bromate and oxidized azur A, a new catalytic spectrophotometric method has been developed in this paper.

基于在一定温度和硫酸介质中，痕量甲醛对溴酸钾氧化天青A有较强的催化作用，建立了测定痕量甲醛的新的催化光度法。

It has been replaced with a park to remember Malili, Angelina, Shantae, Rayden, Azariah, Daniel, Rodney and Patrenella.

如今它被一个公园所取代，用来纪念马丽丽、安吉丽娜、桑塔、瑞德、亚撒利雅、丹尼尔、罗德尼和帕特蕾娜。

Land, in the process of uncontrolled development and the arrogation of technical rationality, has already been far away from the beautiful picture of The Harmony between Human and the Earth.

土地，在被无节制地开发之中，在技术理性的僭越之中，已经悖离了人地和谐相处的美丽画面。

The exact mechanism of the action of arsenical toxicity is not known clearly, but several hypotheses have been proposed.

到目前为止，人类对砷的毒性作用机制还不是很清楚，但存在多种假设：氧化应激，影响细胞增殖，产生基因毒性如影响DNA甲基化、协同致癌、肿瘤促发等。

It has been a knotty problem to extract Au from arsenical polymetallic sulfides.

从含砷的多金属硫化矿中提金，一向棘手。

Arsenic as the toxic contaminants of the environment especially high levels of arsenic in water has been a worldwide problem.

砷作为毒性较大的环境污染物，特别是饮用水中砷含量超标已成为世界性的问题。

World Health Organization and International Agency for Research on Cancer has classified arsenic as a carcinogen, arsenic has been regard as the most toxic substance by the USEPA as well.

世界卫生组织以及国际癌症研究机构都将砷列为人类的致癌剂，在USEPA列表中砷也被认为是1号毒素。

Arsenic ( As) accumulation and volatilization by microorganism decreasing environmental risk of As in soil has been recognized as an economically efficient remediation method without secondary pollution.

利用微生物对砷（As）的累积与挥发来降低土壤中砷的环境风险已被认为是一种经济、有效且无二次污染的修复措施。