大型火力发电厂在生产运行过程中产生大量的粉煤灰，长期积存堆放，污染环境、占用土地。
In Production process of large scale power plant, coal fly ash is produced in large amounts. These coal fly ash is piled up. It pollute the environment, wasting the cultivated land.
虽然氯联苯没有很强的直接制毒性，但是它们能长期存留在环境中，并积存在人体组织里。
Although PCBs have a low immediate toxicity, they are very persistent in the environment and accumulate in tissues over time.
汽车经过长期的使用后，顶棚这个往往在不起眼的地方积存了很多的灰尘，这些地方往往也是日常清理照顾不到的地方。
The car after a long-term use, often in the ceiling of this inconspicuous place accumulated a lot of dust, which is often the daily cleaning, take care of the place.
汽车经过长期的使用后，顶棚这个往往在不起眼的地方积存了很多的灰尘，这些地方往往也是日常清理照顾不到的地方。
The car after a long-term use, often in the ceiling of this inconspicuous place accumulated a lot of dust, which is often the daily cleaning, take care of the place.
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