Definition
occurring or progressing each day; gradually, increasingly over time
每天；逐日；日益，越来越
His health deteriorated day by day.
他的健康状况逐日恶化。
The population of these birds is declining day by day as their habitat shrinks.
随着栖息地缩小，这些鸟类的数量日益减少。
He felt increasingly frustrated day by day.
他感到越来越沮丧。