和系统杂食指数 System Omnivory Index
和食指
And index finger
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他用拇指和食指夹起笔。
He took the pen between his thumb and forefinger.
《柯林斯英汉双解大词典》
用拇指和食指的之隙挤捏它。
Gently squeeze it between thumb and index fingers.
youdao
大拇指和食指用力下压。
Keep the thumbs and index fingers pressing into the floor.
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