经历六年的时间，他们发现，种植三排树木就能减少总计超过一半的尘埃和氨。
They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half.
合成氨装置脱碳系统经过改造，实现了回流液的零排放，解决了回流液的排放问题。
After the revamping of carbon removal system of ammonia plant, zero discharge of reflux is realized, and the problem of reflux discharging is solved.
在盐度为5 ~ 20的范围内，青蛤的耗氧率和排氨率随着盐度的升高而升高。
At the salinity of 5 ~ 20, the oxygen consumption rate and ammonia excretion rate of the Cyclinasinensis increased while the temperature increased.
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