例句與造句

1. It follows that the man could not have finished his countdown at any point in the finite past, since he would have already been done.
2. Craig says that the Friedmann Lema顃re Robertson Walker metric Big Bang model predicts a cosmic singularity, which marks the origin of the universe in the finite past.
3. It's difficult to find finite past in a sentence. 用finite past造句挺難的