A typewriter in which the characters are situated on a type ball.
字符装在字模球上的一种打字机。
A typewriter in which the characters are situated on a type cylinder.
字符位于打印筒上的一种打字机。
Continuous variation (quantitative variation; multifactorial inheritance) a form of variation in which the characters show continuous variation within a certain range of values.
变异的一种类型，其性状在一定的范围内是连续变化的。
Continuous variation (quantitative variation; multifactorial inheritance) a form of variation in which the characters show continuous variation within a certain range of values.
变异的一种类型，其性状在一定的范围内是连续变化的。
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