2 adjectives to describe manpower

Taiwan complains about the "brain drain," as about 93 per cent of its students who go overseas do not return, but in many fields it has sufficient trained manpower to continue its development, and in any case there would not be enough jobs available if all the students returned.

Red Perris also was in the last stage of exhaustionone true pitch would have hurled him limp from his seatyet, with his body numb from head to toe, he managed to keep his place by using that last and greatest strength of feeble manpower of will.

2 adjectives to describe  manpower