He tied a loop of rope around his arm.
他在手臂上用绳子系了一个圈。
She put a loop of rope around the cow's neck.
她把绳圈套在了奶牛的脖子上。
A sliding loop of rope or chain by which a running yard or gaff is connected to, while still being able to move vertically along, the mast.
装于帆桁中央两侧的索具：能滑动的绳圈或链子，用来把帆桁或缆索拴在船桅上，使之仍可以随意升降。
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