名词
中文翻译：腰椎骨
同义词：
['lower back bone', 'lumbar spine例句：1. He sat down on the couch and rested his lower back against the armrest.（他坐在沙发上，把下背部靠在扶手上休息。）']
例句：
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1. He sat down on the couch and rested his lower back against the armrest.
他坐在沙发上，把下背部靠在扶手上休息。
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2.The doctor advised him to exercise regularly to prevent a lumbar spine injury.
医生建议他定期锻炼以防止腰椎受伤。
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3. During the long flight, she adjusted her seat to avoid straining her lower back.
在漫长的飞行中，她调整了她的座位以避免拉伤她的下背部。