The word ritardando ( ritenente or ritenuto ) implies a slowing down .

徐缓这个词（突慢地或突慢的）意味着减速。

Composers most frequently use the terms ritardando and accelerando to introduce rhythmic flexibility into their music .

大部分作曲家经常运用徐缓和渐快术语来引进有节奏的灵活性从而变成他们的乐曲。