名词
中文翻译：内环扣
同义词：
['inner ring', 'inner lock ring', 'inner fastener ring']
例句：
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1. The watchhas an inner split ring that makes it easy to adjust the time.
这款手表有一个内环扣，便于调整时间。
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2.The key has a small inner split ring that can be used to open the lock.
这把钥匙有一个小的内环扣，可以用来打开锁。
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3. The necklace has a beautiful inner split ring that catches the light beautifully.
这条项链有一个美丽的内环扣，能很好地捕捉光线。