Значения для термина "tracked since" отсутствуют.
1 The participants had been tracked since they were four years old.
2 The boat, L'Afalina, had reportedly been tracked since its crew drew attention to it in French Polynesia.
3 Rainfall has been tracked since 1900 and temperatures since 1910.
4 As mentioned earlier, USDA figures show a decline in the nutrient content of the forty-three crops it has tracked since the 1950s.
5 They looked at 1,266 HIV-infected people in the U.S. Air Force who were tracked since the 1980s, as well as 2,000 noninfected people.
6 For the new study, she and her colleagues used data collected from 178 mothers and their 25-year-old children, who had been tracked since birth.
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