1.I was hit by the realisation that I might die.

1.认识能要死。

2.The realisation that she was gone was like a knife thrust.

2.意识她已走让心像刀扎一样。

3.It seemed that the realisation of his life’s dream oppressed him with overjoy.

3.夙愿得偿似乎使他欣喜若狂。

4.The realisation that the murderer must have been a close friend came as a shock.

4.意识手一定是个密友，大家都很震惊。