Conclusions: Elderly upper gastrointestinal bleeding were mainly caused by gastric and duodenal ulcer and gastric mucous lesions.是什么意思_Conclusions: Elderly upper gastrointestinal bleeding were mainly caused by gastric and duodenal ulcer and gastric mucous lesions.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句