[zhú jiàn]
gradually; by degrees; little by little
develop gradually
逐渐发展
The sound faded into nothingness.
声音逐渐消逝。
The weather is gradually getting warmer.
天气逐渐变暖。
Year by year a few of these slang terms prove so useful that they graduate into respectable society.
年复一年， 这些俚语中的一些证明是十分有用的， 因而逐渐进入了上流社会。