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discovered or determined by scientific observation; "variation in the ascertained flux depends on a number of factors"; "the discovered behavior norms"; "discovered differences in achievement"; "no explanation for the observed phenomena"
stick to correctly or closely; "The pianist kept time with the metronome"; "keep count"; "I cannot keep track of all my employees"
make mention of; "She observed that his presentation took up too much time"; "They noted that it was a fine day to go sailing"
observe with care or pay close attention to; "Take note of this chemical reaction"
discover or determine the existence, presence, or fact of; "She detected high levels of lead in her drinking water"; "We found traces of lead in the paint"
watch attentively; "Please observe the reaction of these two chemicals"
follow with the eyes or the mind; "Keep an eye on the baby, please!"; "The world is watching Sarajevo"; "She followed the men with th