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In terms of the time focus of the last century in the world, researchers hold a variety of perspectives. To sum up, it should refer to the comparison of changes between the last century and this century, and to learn new things by reviewing the old ones. This time interval also includes the changes in the new Millennium.The great change in a hundred yearsIn terms of the time focus of the last century in the world, researchers hold a variety of perspectives. To sum up, it should refer to the comparison of changes between the last century and this century, and to learn new things by reviewing the old ones. This time interval also includes the changes in the new Millennium.

When we analyze and understand these great changes, we must keep in touch with the changes in China, keep pace with the times, keep learning and making progress, and seize the opportunities of the times to adapt to the rapidly changing society.In terms of the time focus of the last century in the world, researchers hold a variety of perspectives. To sum up, it should refer to the comparison of changes between the last century and this century, and to learn new things by reviewing the old ones. This time interval also includes the changes in the new Millennium.

In terms of the time focus of the last century in the world, researchers hold a variety of perspectives. To sum up, it should refer to the comparison of changes between the last century and this century, and to learn new things by reviewing the old ones. This time interval also includes the changes in the new Millennium.In terms of the time focus of the last century in the world, researchers hold a variety of perspectives. To sum up, it should refer to the comparison of changes between the last century and this century, and to learn new things by reviewing the old ones. This time interval also includes the changes in the new Millennium.