Because till then science has not so much developed in this field.
कय क तब तक वजञन न इस कषतर म इतन परगत नह क थ
<bos><start_of_turn>user
Because till then science has not so much developed in this field.<end_of_turn>
<start_of_turn>model
कय क तब तक वजञन न इस कषतर म इतन परगत नह क थ<end_of_turn>
