名词
中文翻译：Unknown
同义词：
['vital', 'vitality', 'lifeline']
例句：
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1. The vitalograph is a device that measures the amount of oxygen in the blood.
生命之线是一种测量血液中氧气含量的设备。
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2. The violinist played a beautiful piece on the violin, and it was like a lifeline to the audience.
小提琴家在小提琴上演奏了一首优美的曲子，就像给观众的生命线一样。
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3. The violinist's performance was a lifeline for many people who were feeling down.
小提琴家的表演为许多感到沮丧的人带来了希望。