Các câu ví dụ cho từ concentrations

1. Vietnam to probe mass-produced fish sauce A survey by a consumer protection group is pointing to what it calls "an alarming connection between high arsenic concentrations in fish sauce and public health", while many experts disagreed.

2. Hoa Binh police concluded that the water used in the dialysis treatment was the cause of the incident, as concentrations of fluoride in the water were up to 260 times above the permitted level.

3. In all cases, blood tin concentrations were 10 times higher than the permissible limit, marking the first case of acute tin poisoning reported in Vietnam.

4. Blood samples from a 35-year-old deceased patient showed tin concentrations 50 times higher than the safe level.

5. concentrations of hazardous ground-level ozone have worsened in northern China despite country-wide efforts to tackle air pollution, according to a study published by Peking University on Tuesday.

6. Ozone rose throughout the region, with concentrations up 40 percent or more in 10 northern cities from 2014 to 2017, the study said.