Time flies, and memories of 2020, like a mixed-up jar of sweet, sour, bitter, and salty flavors, quietly left us, making way for the beautiful 2021.

Farewell, 2020, with its ups and downs； welcome, 2021, with its promise of new beginnings and opportunities.

As the last moments of 2020 swiftly pass by, we bid adieu to the old and usher in the new, embracing 2021 with hope and optimism.

In 2020, we faced challenges and learned valuable lessons； in 2021, let us carry forward the lessons and face the future with even greater courage and confidence.

The year 2020 may have been difficult, but it has also been a year of growth and transformation. Let us now look forward to 2021 with a positive mindset and a fresh start.

这些句子既表达了对过去一年的回忆和感慨，也寄托了对新一年的美好期望和祝福。希望这些句子能帮助你更好地告别2020，迎接2021。