a locus with four alleles

例句：

1. 1. The scientist found a new locus for the virus in the ocean.
   科学家在海洋中发现了病毒的新宿主。
2. 2. The map shows the locus of the city on the map.
   地图上显示了城市的大致位置。
3. 3. The team was able to locate the lost item in the park.
   团队能够在公园里找到丢失的物品。