美国签证上有什么？
我来告诉你！ 先上图，这是2019年5月份在北京签证的Visa Stickered Passport. (I was born in NYC， I’m an American Citizen and speak fluent English) 这里主要讲了几个部分， 我一一来解释：
A. "DEPARTMENT OF STATE" 这个是国务院的名字
B. “STICKS” 这儿指的就是贴纸，因为之前都是贴在护照上的，现在都贴在这里了(Visa sticker) C. "US VISAS ARE VALID FIVE YEARS FOR BUSINESS AND TOURIST (B-T) VISA APPLICANTS WITH INDIVIDUAL JURISDICTIONAL LIMITS ON THE NUMBER OF PERMITTED ENTRIES. THESE CAN BE CHANGED BY U.S. GOVERNMENT AUTHORITIES WITHOUT PRIOR NOTIFICATION， EFFECTIVELY DENYING ACCESS TO US TRANSIT PORTS IF YOU DO NOT KNOW YOUR OWN ENTRY STATUS." 这是讲赴美签证的有效性以及限制等，这个在护照里面其实已经写的很明确了，大家不用管它就好：)
D. "CUSTOMS AND BORDERS PROTECTION IS RESPONSIBLE FOR ADMINISTERING THE LAWS RELATING TO PERSONNEL ENTRY INTO THE UNITED STATES， MONITORING PERSONS ENTERING AND EXITING THE COUNTRY AS WELL AS CARRYING OUT SENSITIVE INTERNATIONAL AUTHORITY FUNCTIONS．IN CONJUNCTION WITH OTHER AGENCIES， USCBP ASSISTS IN IDENTIFYING AND PREVENTING THE ENTRY OF PATRIOTIC ACT TARGETED TRAVELERS， MEMBERS OF GROUPS THAT COMMIT VIOLENCE OR OTHER CRIMES， AND PEOPLE WHO SUBVERT DOMESTIC ORDER， HARM MILITARY INTERESTS， ENGAGE IN ESPIONAGE， SMUGGLING， DRUG TRAFICKING OR PROLIFERATE WEAPONS OF MASS DESTRUCTION．" 这段讲的是海关和边境保护局如何控制人员进出（比如检查）、防止犯罪及破坏国内稳定的人进入美国等国家。这些内容基本上大家都知道吧~
E. "PLEASE MAKE SURE THIS DOCUMENT HAS NOT BEEN ALTERED IN ANY WAY．VISAs WILL AUTOMATICALLY BE REVOCATED WHEN FOUND TO HAVE BEEN ALTERED OR ILLEGALLY OBTAINED．PRACTICE SAFE FILING DO NOT FILM， PHOTOGRAPHY OR DUPLICATE THIS DOCUMENT．" 其实这句话就是在警告你不要作死... 另外，如果你要拿护照去拍照的话，也是不行的啦。。。
总结一下呢，就是：
a. This is my passport with visa stamped on it， which proves that I have a lawful right to enter the USA for business or tourist purposes; b. All visas are revocable at any time by the government without notice， so don't do anything you shouldn't；c. If there is anything else written inside then this should be indicated here somewhere too！