He that converses not knows nothing.
不与别人交谈的人孤陋寡闻.
Scientists actually know little about how animals perform their navigational feats.
科学家们对动物的这种导航绝技却是孤陋寡闻的.
Were our ancestors lucky to be only partly informed?
我们的祖先孤陋寡闻是否算幸运 呢 ?
To study alone without friends around makes one learn less and be ignorant.
独学无友,则孤陋寡闻.
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