高考结束后，可以用以下几种英文表达：

"The college entrance exam is over."

"The gaokao is over."

"The university entrance exam is over."

"After the examination, the college entrance exam is finally over."

这些表达都可以准确地传达高考结束的意思。你可以根据自己的喜好和语境选择合适的表达方式。例如，在正式的书面语中，"The college entrance exam is over." 可能更为常见；而在日常对话中，"The gaokao is over." 可能更加自然。