渐进的英文：
progress step by step
gradual progress
to move forward (slowly)

参考例句：

The onset is usually gradual and associated with anorexia, lethargy
通常起病渐进，伴有厌食，昏睡。

The relations reflect the nature of the tectonic movement, that is, gradual or cyclic
这些关系反映出构造运动的性质，是渐进的或是旋回的。

Shoot for gradual, long-term progress
力争渐进、长期的进步。

The gradual process of wasting.
耗费浪费的渐进过程

stop of gradual advancing process
渐进过程的中断

This is a progressive course in English study.
这是英语学习的渐进课程。

The fight against corruption is a gradual process.
反腐斗争是一个渐进的过程。

Losing weight is a slow, gradual process.
减肥是一个缓慢而渐进的过程。

The gradual and piecemeal change was welcomed by most people.
这种一点一点渐进的改变受到大多数人的欢迎。

We are seeking continuous, incremental improvements, not great breakthroughs.
我们在寻求持续的、渐进的改善，而不是重大的突破。

progress是什么意思：
n. 进步，进展；前进；增长；进化
v. 发展；促进；前进；进行

progressive tense
ph.1. 【语】进行时态,进行式

innovative progress
开拓进展

The road construction work is in progress.
筑路工程正在进行中。

step是什么意思：
n. 脚步；步态，步伐；步骤；措施；阶段，等级；台阶，平台；舞步
v. 踩，踏；跨步，行走；跳舞；使成阶梯状

step by step welding
跨步焊法

It is a step class.
这是踏板操训练班。

They are not in step with the times.
他们跟不上时代的步伐。

gradual是什么意思：
adj. 渐渐的；平缓的

But that climb will be gradual.
但是，这个攀升将是平缓的。

The muddy river cleared gradually.
污浊的河流渐渐变清了。

To gain entrance gradually or surreptitiously.
渗透逐渐地或秘密地获得进入权