The first sentence "Acacia under the cherry tree" expresses the acacia between lovers, and the "Acacia under the cherry tree" here is the artistic conception in the poem, symbolizing spring and love.
The second sentence "full of ups and downs" means: I feel the taste of love, both sweet and painful, even if it is ordinary, it is not surprising.
The third sentence, "If the spring breeze is still good", expresses the hope that love can last for a long time, even if it has withstood the test of time, it will continue to blow like the spring breeze.
The last sentence, "two people know that the branches and leaves are lush", means that when the spring breeze blows on the cherry tree, the branches and leaves on the tree will become more and more lush and can be perceived and shared by lovers.
The whole poem expresses the unswerving feelings between lovers and their long-lasting desire for this love.