The human appendix is a small dead-end tube connected to the cecum, or ascending colon, one section of the large intestine.

人的阑尾是个很小的一端闭锁的细长盲管，它的另一端连结盲肠，也叫升结肠，属于大肠的一部分。

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Mr. Walker says 142 pairs of "tube" stations are closer by foot than by train, once factoring in time spent descending to and ascending from the platform, and waiting.

WSJ: Timing an Urban Stroll Isn't a Walk in the Park