Zhè / xiàng / zīyuán / chángqī / bèi / shǎoshù / gōngsī / dàngzuò / jìn / luán / wàibù / qǐyè / nányǐ / cānyù

这项资源长期被少数公司当作禁脔，外部企业难以参与。

For a long time, a few companies have treated this resource as their exclusive preserve, making it hard for outside businesses to participate.