...示被动的固定用法，如It is believed that (人们相信) , It is suggested that (有人建议) , It has been proved that (已经证明)等。熟悉上 述用法，可以避免直译时“被”字充斥全文， 使其更加符合中文的表述习惯。
2
?我们的肤色取决于遗传
It has been proved that (我们的肤色取决于遗传). No other reproduction in any form is permitted (未经出版社书面同意).
3
?一切证明
It has been proved that... 一切证明 There has been evidence that..
双语例句
1
Ithasbeenprovedthat sorting out your desk can improve your learning and working efficiency.
事实证明，整理你的桌子可以提高你的学习和工作效率。
2
Ithasbeenprovedthat Low Till Farming increases harvests and reduces water use, and this method reduced the need for chemical products because there are fewer unwanted plants.