“开着的”用英语怎么说？

走廊里的煤气灯应该是开着的，调得比较暗。The gaslights in the passage would be on, turned low.柜台后面有一台开着的便携式小型电视机。There was a little portable television switched on behind the bar.一只黄蜂飞进了开着的窗子。A wasp flew in the open window....