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Scientists have long wondered where our handedness comes from .

科学家很久以来一直不明白我们使用那只手的习惯从何而来。

Preliminary exploratory factor analysis of a handedness inventory .

手侧化量表之初步探索性因素分析。

Handedness clearly runs in families .

偏手性显然与家族遗传有关。

For the relationship between handedness and speech lateralization , see chapter four .

惯用手和语言侧化的关系，见第四章。

Sometimes the teachers forget to remind the children which coloured handle saws are for which handedness .

有时，教师忘记提醒儿童彩色处理锯是为手段。