### Chinese: 一年来，世界百年未有之大变局和新冠肺炎疫情全球大流行交织影响，外部环境更趋复杂严峻，国内新冠肺炎疫情防控和经济社会发展各项任务极为繁重艰巨。
### English: Over the past year, the world has undergone profound changes unseen in a century and the global pandemic of the COVID-19 epidemic has intertwined. The external environment has become more complex and severe. The domestic tasks for the prevention and control of the COVID-19 epidemic and economic and social development are extremely <v>arduous and arduous</v>.
### Errors: There is a major accuracy/mistranslation error at "arduous and arduous" within <v></v>.

### Improved English: For the past year, under the intertwined influences of the great changes never seen during the past one hundred years and the COVID-19 global pandemic, external environments were more complicated and grim, and the tasks of pandemic prevention and control and various economic and social development tasks are extremely heavy and arduous.
