With features that can vary somewhat in form without greatly affecting function, such as the shape of the skull, chance might play a bigger role in their evolution than natural selection.
一些具有差异化的表现形式但对功能影响不大的特征- - -比如头盖骨的形状，在进化过程中可能起着比自然选择更重要的作用。
A bigger concern is that early selection fails children from poor and immigrant families, who are likeliest to attend the least academic schools and to miss out on apprenticeships.
更大的担忧在于，较早地选择教育道路不利于来自穷人家庭和移民家庭的孩子，他们最有可能进入学术性不强的学校，并且最有可能失去接受学徒培训的机会。
A bigger concern is that early selection fails children from poor and immigrant families, who are likeliest to attend the least academic schools and to miss out on apprenticeships.
更大的担忧在于，较早地选择教育道路不利于来自穷人家庭和移民家庭的孩子，他们最有可能进入学术性不强的学校，并且最有可能失去接受学徒培训的机会。
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