The parrots were given the intellectually demanding task of pulling a snack onastring up to their beaks, using a co-ordinated combination of claws and beak.
鹦鹉们被分派了一项对智力要求很高的任务,它们要协调爪子和喙,将一份拴在绳子上的零食拉到它们的喙上。
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Once synthesized, the histones move into the cell nucleus, where a section of DNA wraps around them to form a structure that resembles beads, or knots, onastring.
一旦合成,组蛋白就会进入细胞核,细胞核内的 DNA 片段会将组蛋白包裹起来,形成一种类似串珠或绳结的结构。