everything is clear to sb; greatly discerning and apprehending;in a sudden flash of realization; great awakening ❍ 我于是大彻大悟。(鲁迅《伪自由书》53) Then everything was clear to me. ❍ 但是立即～一般想，那有这回事，自己一定在做梦了；停住吧，不要再做吧。(叶圣陶《倪焕之》354) But at once he thought as if in a sudden flash of realization: how could all this be happening? He must surely be dreaming; he must stop,mustn’t go on.