名词
中文翻译：排空管
同义词：
['excretory duct', 'excretory tubule']
例句：
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1.The kidneys are responsible for filtering blood and discharging waste products.
肾脏负责过滤血液并排放废物。
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2. The excretory duct is a long tube that carries urine from the kidneys to the bladder.
排泄管是一条长管，将尿液从肾脏输送到膀胱。
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3. The excretory tubules are small channels in the kidneys that help filter blood and remove waste products.
肾小管是肾脏中的小通道，帮助过滤血液并排除废物。