| 释义 |
U LETTER plural U'su plural u's jU:n [C] the 21st letter of the English alphabet英语的第二十一个字母A U-bend is a U-shaped piece of piping, esp. one fixed under a toilet or BASIN, which holds water in its lower part and prevents unpleasant gases from getting out. U形管，马蹄弯头There was a blockage in the U-bend which caused the kitchen to flood. U形管里有阻塞物, 这使厨房积水。
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