留意地 meaning in English

alertly
attentively

The count himself was neither smoking nor talking , but , with his head cocked first on one side and then on the other , gazed with evident satisfaction at the smokers , and listened to the argument he had got up between his two neighbours
伯爵自己不抽烟，也不开口说话，可是他时而把头侧向这边，时而侧向那边，显然他在留意地观看这两位抽烟的客人，静听被他惹起的两位邻座的讧争。