He has an endearing habit of lickinghislips when he's nervous.
他有个紧张时舔嘴唇的可爱习惯。
《柯林斯英汉双解大词典》
2
Road is still very far away, when Klaette unable to cope to the ground, the cat will come over, lickinghislips, cheeks, pulling his hair, had to encourage him to stand up, move on.