step by step, progressively gradually 
nach und nach nach und nach 
progressivamente progressivamente 
progressivement progressivement 
progresivamente progresivamente step by step, progressively 13 逐步 [-] zhúbù (progressive-step) step by step, progressively: ~提高 raise step by step || ~完成 complete step by step || ~发展develop step by step ' gradually 14 逐渐 [-漸] zhújiàn (progressive-gradual) gradually: ~了解gradually understand || ~增多 gradually increase || ~改变 gradually change '
Bác sĩ khuyên tôi giảm dần liều. 
My doctor advised me to gradually decrease the dose.
Mein Arzt riet mir, die Dosis schrittweise zu verringern.
แพทย์ของฉันแนะนำให้ฉันค่อยๆลดขนาดลง
我的医生建议我逐渐减少剂量。