解开系船索，我们准备航行了。
系船索：能被缚在一个物体两端，并从其中心点吊起的链子、缆绳，绳索的跨绳。
Nautical A span of chain, wire, or rope that can be secured at both ends to an object and slung from its center point.
系船索：能被缚在一个物体两端，并从其中心点吊起的链子、缆绳，绳索的跨绳。
Nautical A span of chain, wire, or rope that can be secured at both ends to an object and slung from its center point.
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