One New Caledonian crow, called Betty, bent some straight wire into a hook and used it to lift a small bucket of her favourite food from a vertical pipe.

一只名叫贝蒂的新喀里多尼亚乌鸦把一根笔直的铁丝咬成一个弯钩，用它把一小桶她最喜欢吃的食物从一根垂直的管子里吊了出来。

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For example, if you want to count only the words in the first five text files in the directory, you can use a pipe (|) to hook the wc and head commands together.

例如，如果您仅希望计算该目录下的前5个文本文件的单词数，那么可以使用竖线(|)将wc和head命令连接起来。

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DQ-0772 Bonunion Huixin Coat Hat Rack Y-shaped body design, appearance patent and one structure patent for utility model, connected by necking pipe which makes top hook direction adjustable.

DQ-0772宝优妮惠心衣帽架 Y型主体设计，拥有外观专利与实用新型专利结构设计，缩口管连接，让顶部挂衣钩方向可以自由调节；

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