警惕地

He stood alertly at the door, watching for any signs of danger.
他警觉地站在门口，留意任何危险迹象。
The sentry was on duty, alertly scanning the surroundings.
哨兵正在值勤，警惕地扫视着周围环境。
The cat sat alertly by the mouse hole, ready to pounce.
猫儿警惕地蹲在鼠洞旁，随时准备扑上去。
She listened alertly to the professor's lecture, taking notes intently.
她聚精会神地听着教授的讲座，认真做着笔记。
The eagle flew overhead, alertly surveying the landscape below.
鹰翱翔在上空，警惕地俯瞰着下方的地形。
As a lifeguard, it is essential to remain alertly vigilant at all times.
作为一名救生员，始终保持高度警惕至关重要。
The detective watched the suspect alertly, looking for any suspicious behavior.
侦探警惕地注视着嫌疑人，寻找任何可疑的行为。
The hiker walked along the trail, alertly watching for any signs of wildlife.
徒步者沿着小径行进，警惕地注意着是否有野生动物出没的迹象。
The border patrol agents drove their vehicle alertly along the frontier.
边境巡逻队员驾驶车辆沿边境地带保持警惕行驶。
The security guard patrolled the premises with an alert demeanor.
守卫以警惕的姿态巡逻着场地。