西瓜不比柠檬酸草莓不比橘子甜
[xī guā bù bĭ níng méng suān căo méi bù bĭ jú zi tián]
Literally 'Watermelon is not as sour as lemon, strawberry is not as sweet as orange.' It uses fruits to metaphorically describe comparative feelings. It may imply different tastes suit different people at different times.