他在牢房中找到了一根绳索，但这根绳索只有够他安全到达地面的长度的一半。
He found a rope in his cell that was half as long enough to permit him to reach the ground safely.
需要把松弛的绳索系紧，这样会更安全。
The slack rope needed to be tightened to make it more secure.
人性化安全设计，如安全门、绳索、不导电等。
Humane safety design, such as safety door, rope, non-conductive, etc.
人性化安全设计，如安全门、绳索、不导电等。
Humane safety design, such as safety door, rope, non-conductive, etc.
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