氯苯类有机物在环境中广泛存在，由于其具有不同程度的毒性，生物累积性和持久性，对环境和人畜健康具有潜在危害。
Chlorobenzene is existed in environment, is one kind of pollution with more toxicity and bioaccumulation and persistence, had more harmful to the health of people and livestock.
潜在危害包括生物性、化学性和物理性；
The latent hazard includes biological hazard, chemical hazard and physical hazard.
沉积物中汞的生物有效性较高，对红树林生态系统存在一定的潜在危害。
The relatively high bio-availability of mercury in the sediments indicated certain potential hazard to the mangrove ecosystem.
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