undivided
adj
(idm 习语) give one´s undivided attention (to sth/sb); get/have sb´s undivided attention concentrate fully (on sth/sb); be the one thing or person that sb attends to 全神贯注(於某事物[某人]); 为某人关注的对象
You have my (full and) undivided attention. 你是我一心(一意)注意的人.
Tom seldom got his mother´s undivided attention. 汤姆很少受到母亲全心的关怀.