(from) the thirtieth to the forty-ninth (从)第三十到第四十九
Thirty ,thirty-one ,thirty-two,thirty-three,thirty-four,thirty-five,thirty-six,thirty-seven,thirty-eight,thirty-nine,fouty,forty-one,forty-two,forty-three,forty-four,forty-five,forty-six,forty-seven,forty-eight,forty-nine
from the thirtieth to the forty-ninth