She said the country has made " great progress" in breeding sheep that produce less gas.

她说，该国在培育产生较少气体的绵羊方面取得了“巨大进展”。

So we must assume that from the beginnings of Neolithic farming the number of breeding sheep would have considerably exceeded three hundred, and the national cattle herd must have been of a similar size.

所以我们必须假定新石器时代农业开端的繁殖种羊在数量上超过300头，而牛群的数量也是一致。