concentrate upon ( synonym found)
Definition of concentrate upon:

(n) : the amount of solute in a solution measured in parts per million (ppm); the act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration
Definition of concentrate upon:

(n) : the amount of solute in a solution measured in parts per million (ppm); the act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration
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