短語詞組短語trackable integer 可點選物件Online Trackable 網上可追蹤T Trackable 跟蹤的Trackable Service 可追蹤的服務Results must be trackable 事事必須跟蹤結果Result must be trackable 結果一定要可以被追蹤Trackable & time bound 時傚跟催Timely and Trackable 可追蹤的l T Trackable 可以跟蹤的 返回 trackable