名词
中文翻译：第一根手指
同义词：
['first finger', 'primary finger例句：1. She held her first finger in front of her mouth and made a sound.（她把第一个手指放在嘴边，发出了声音。）2. He used his first finger to point to the sky.（他用第一个手指指向天空。）']
例句：
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1. She held her first finger in front of her mouth and made a sound.
她把第一个手指放在嘴边，发出了声音。
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2. He used his first finger to point to the sky.
他用第一个手指指向天空。
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3.The first finger on her left hand is the thumb.
她左手的第一个手指是拇指。