○ the transition was almost indiscernible ○ an almost insensible change
常用词组
例句
1.
The path was altogether indiscernible in the murky darkness which surrounded them(Sir Walter Scott.Figuratively it can imply dark vagueness 这条小径被围绕在漆黑中难以辨别(沃尔特·斯科特爵士)。它能象征性地暗示不明确、朦胧模糊