There's a blockage in the pipe.
管


。
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理学小课堂 To combat this, trees in the dry tropics developed skinnier pipes, which, thanks to the counterintuitive physics of bubbles in water, develop fewer bubble blockages than the wide, high-capacity pipes of their wet-tropical cousins.
为了解决这个问题,干燥热带的树木进化出了更细的管道,由于水中气泡的反直觉物理学原理,这种管道比湿热带表亲的宽大、高容量管道产生的气泡堵
更少。
Signs and symptoms of gallstone ileus include abdominal distension from the blockage, as well as nausea and vomiting, and a history of recurrent right upper quadrant pain, which is consistent with the repeated inflammation of chronic cholecystitis.
胆石性肠梗阻的症状和
征包括梗阻引起的腹胀、恶
、呕吐,反复发作的右上腹痛史,这与慢性胆囊炎的反复炎症症状一致。