求翻译：胃癌是我国常见的恶性肿瘤之一，在我国其发病率居各类肿瘤的首位。在胃的恶性肿瘤中，腺癌占95%这也是最常见的消化道恶性肿瘤，乃至名列人类所有恶性肿瘤之前茅。早期胃癌70%以上无明显症状，随着病情的发展，可逐渐出现非特异性的、类同于胃炎或胃溃疡的症状，包括上腹部饱胀不适或隐痛、泛酸、嗳气、恶心，偶有呕吐、食欲减退、消化不良、大便潜血阳性或黑便、不明原因的乏力，消瘦或进行性贫血等。当临床症状明显时，病变已属晚期。因此，要十分警惕胃癌的早期症状，以免延误诊治。是什么意思？

Gastric cancer is one of common malignant tumors in China, its incidence in our country ranks first in all kinds of tumors. Malignant tumors in the stomach, adenocarcinoma accounted for 95% of which is the most common gastrointestinal cancer, even among the highest in all human malignant tumors. Ear

Stomach Cancer is common in our country, one of the malignant tumor in my its incidence of various tumors of the top ranked. In stomach cancer, adenocarcinoma accounts for 95% This is also one of the most common digestive malignant tumors, and even in Portsmouth before human all malignant tumors. Mo

Malignant tumor of gastric cancer is common in China, one of the first incidence of various types of cancer in China. Gastric cancer, adenocarcinoma accounts for 95% this is the most common malignant tumor of digestive tract, and even name all human malignant tumor of the vanguard. 70% than no obvio