有奖纠错
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PBS趣

Compared to other animals, we lie on the " altricial" end of the spectrum.

与其他动物相,我们处于“晚成雏”

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deft, deftly, deftness, defuelling, defunct, defunctive, defund, defundation, defurfuration, defuse,

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3G, 401(K), a,
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