如何把pdf文件变小

[[{"txt": "Adobe\u00a0Acrobat\u00a01.\u7528Adobe\u00a0Acrobat\u6253\u5f00\u8fd9\u4e2apdt\u6587\u4ef6\u3002\u5e76\u70b9\u51fb\u83dc\u5355\u680f\u4e0a\u7684\u6587\u4ef6\u00a02.\u5728\u5f39\u51fa\u7684\u83dc\u5355\u91cc\uff0c3.\u70b9\u51fb\u540e\uff0c\u5f39\u51fa\u4fdd\u5b58\u7a97\u53e3\uff0c\u6211\u4eec\u5728\u6587\u4ef6\u683c\u5f0f\u91cc\uff0c\u9009\u62e9\u5982\u56fe\u6240\u793a\u7684pdf(\u4f18\u5316\uff09\u683c\u5f0f\u3002\u9009\u62e9\u540e\uff0c\u70b9\u51fb\u4e0b\u65b9\u7684\u8bbe\u7f6e\u6309\u94ae\u3002\u00a0\u00a0"}], [{"txt": ["\u65b9\u6cd5/\u6b65\u9aa4"]}, {"txt": "4.\u5728\u5f39\u51fa\u7684\u8bbe\u7f6e\u7a97\u53e3\u91cc\u3002\u70b9\u51fb\u9009\u62e9\u5de6\u8fb9\u7684\u56fe\u50cf\uff0c\u7136\u540e\u628a\u91c7\u6837\u6539\u4f4e\u4e00\u70b9\uff0c150\u6216\u4ee5\u4e0b\u7684\u6570\u503c\uff0c\u56fe\u7247\u8d28\u91cf\u9009\u62e9\u4f4e\uff0c\u6216\u66f4\u4f4e"}, {"txt": "\u00a0 \u00a0 \u00a0 \u00a0\u63a5\u7740\u70b9\u51fb\u5de6\u8fb9\u7684\u5b57\u4f53\uff0c\u5e76\u5728\u53f3\u8fb9\u628a\u4e00\u4e9b\u4e0d\u592a\u9700\u8981\u7684\u5b57\u4f53\u53d6\u6d88\u5d4c\u5165\u3002\u00a0 \u00a0 \u00a0 \u6700\u540e\u8fd8\u53ef\u4ee5\u5728\u653e\u5f03\u7528\u6237\u6570\u636e\u9009\u9879\u91cc\uff0c\u653e\u5f03\u4e00\u4e9b\u5143\u6570\u636e\uff0c\u6216\u6ce8\u91ca\uff0c\u8868\u5355\u5185\u5bb9\u3002\u53ef\u4ee5\u628a\u8fd9\u989d\u5916\u7684\u6570\u636e\u653e\u5f03\u4e0d\u8981\u3002\u00a0\u00a0"}, {"txt": "\u70b9\u51fb\u786e\u5b9a\u6309\u94ae\uff0c\u5f00\u59cb\u4fdd\u5b58\u540e\uff0cAdobe\u00a0Acrobt\u6216\u4f1a\u4e3a\u6211\u4eec\u5904\u7406\u538b\u7f29\u4e86\u00a0\u6700\u7ec8\u4fdd\u5b58\u7684\u6587\u4ef6"}]]