1.
crumble away: fall in small pieces gradually, disintegrate gradually
逐渐碎裂，逐渐瓦解
2.
step - by - step a.
逐步的, 逐渐的, 步进的
3.
Dwindle away/down
（逐渐）减少，缩小
4.
To become gradually less until little remains.
逐渐减少逐渐地减少直到所剩无几
5.
rising/falling oil revenues
逐渐增加的[逐渐减少的]石油收入.
6.
remain present although waning or gradually dying.
仍然存在尽管逐渐减弱或者逐渐垂死。
7.
His hair's/He's getting rather thin on top, ie He is starting to go bald.
他渐渐歇顶了（他头顶的头发逐渐稀少）.
8.
The south side of the island sheltered down to the sea.
岛的南端逐渐倾斜入海。
9.
The ship melted into the darkness.
轮船逐渐隐没在黑暗中.
10.
It' s getting cold day by day.
天气逐渐冷起来了。
11.
A taste that grows on a person.
使人逐渐喜爱的口味
12.
a progressive disease,ie one that gradually increases in its effect
进行性的疾病（逐渐严重）
13.
The hills around here fall towards the ocean.
土地逐渐向河边下斜。
14.
The shore shelves down to the sea.
海岸逐渐地向大海倾斜。
15.
By and by, however, he began to gain courage.
不过，后来他逐渐胆大了。
16.
Her weight is slowly coming down.
她的体重在逐渐减轻。
17.
Clouds building on the horizon.
地平线上逐渐增多的云
18.
scarlet shading into pink
猩红色逐渐变成粉色