在线求指导：In the past decades,

1 :in the past two decades,the chinese stud in the last few decades和over the past few decades 意思一样吗 In the past three decades ,___ significant advance has benn In the past decades,sea ice ______ in the Arctic as a result In the past decades,the farms have succeeded in producing en Several times over the past decades Over the past decades,sea ice ___ in the Arctic as a result 英语翻译But in the past three decades,they have been under the t ）Over the past decades,sea ice in the Arctic as a result of Over the past decades,sea ice has been decreasing in the Arc Over the past decades,sea ice ________ in the arctic as a re 英语翻译In the past decades,various strategies have been used to