At four months babies can grasp objects with their hands.

四个月大时就能用手抓东西。

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Watching apes and monkeys use their feet to grasp objects reminds us that at one point it was useful to have nails on our toes, but they're simply not as necessary now.

观察类人猿和猴子用脚抓取东西让我们想起曾几何时脚指甲对我们也是同等有用，但现在似乎没那么必要了。

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Unlike modern apes and chimps, these hominids had supple wrists, strong thumbs, flexible fingers and power-grip palms shaped to grasp objects like sticks and stones firmly.

与现代猿猴和猩猩不同，这些原始人有着柔软的腕关节、强壮的拇指、灵活的手指和握力很强的手掌，可以牢牢地抓握棍子和石头等物品。

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