safe length的意思|示意

The young man sat safe within, till at length it ran ashore upon an unknown land.

年轻人安全地坐在里面，直到最后它漂到一块陌生的陆地上。

A vessel of less than 20 metres in length or a sailing vessel shall not impede the safe passage of a power-driven vessel following a traffic lane.

帆船或长度小于20米的船舶，不应妨碍按通航分道行驶的机动船的安全通行。

When work is to be interrupted for any length of time, the valve should be closed and all gas released from the hose and regulator to a safe location.

当工作被打断任何长时间时，必须关闭阀门，把软管和调整器内的所有气体排放到安全的地方。