Blocked catch - pits were cleared and sprayed with lavicidal oil when necessary . illegal ponds were drained or treated 他们清理淤塞的渠口，保持它们畅通，并在有需要时施用防蚊油又整顿了非法辟建的鱼塘。
2.
Blocked catch - pits were cleared and sprayed with lavicidal oil when necessary . illegal ponds were drained or treated 他们清理淤塞的渠口，保持它们畅通，并在有需要时施用防蚊油；又整顿了非法辟建的鱼塘。
