Our unfenced and largely unpoliced border inevitably has been very porous.
我们不设防的广阔而未受监管的边界不可避免地会有许多“漏洞”.
The two floor openings were totally unfenced and the workers were not provided with any safety belt or fall arresting device.
两个洞口当时全无围栏阻隔,亦无给予工人安全吊带或防堕装置。
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