钙: calcium (chemistry)...
追踪: to follow a trail, to trace, to pursue...
协调: to coordinate, to harmonize, to fit together, to match (colors etc), harmonious, concerted...
遗忘: to become forgotten, to forget...
打算: to plan, to intend, to calculate, plan, intention, calculation...
税收: taxation...
打牌: to play mahjong or cards...
此刻: this moment, now, at present...
拙劣: clumsy, botched...
一系列: a series of, a string of...
