large concentration

• 正常品种

large concentration的用法和样例：

例句

1. There's a large variety of goods in the shops.
   商店内有品种繁多的货物。
2. If we rely on the good breed cow to meliorate the local cow, it will need the foreign exchange of large quantity.
   在发展优质肉牛生产上无论是全省还是全国，都缺少优良品种的肉用牛。