名词
中文翻译：训练员
同义词：
['guardian', 'protector']
例句：
-
1.The train guard was very helpful in keeping the passengers safe.
火车警卫在确保乘客安全方面非常有帮助。
-
2. The guard at the entrance kept an eye on all who entered the building.
入口处的警卫对所有进入大楼的人都进行了监视。
-
3. The guard stood watch over the gate while the police searched the area.
警察搜查该地区时，警卫站在大门处进行监视。