This army of ours defended by Bhishma is insufficient, whereas that army of theirs defended by Bhima is sufficient. Or, This army of ours protected by Bhishma is unlimited, whereas that army of theirs protected by Bhima is limited.

aparyāptaṃ = immeasurable; tat = that; asmākaṃ = of ours; balaṃ = strength; bhīṣma = by Grandfather Bhishma; abhirakṣitaṃ = perfectly protected; paryāptaṃ = limited; tu = but; idaṃ = all this; eteṣāṃ = of the Pandavas; balaṃ = strength; bhīma = by Bhima; abhirakṣitaṃ = carefully protected.;