For instance, university students who have been through senior high school know what trigonometric functions are, so they don't need to have them explained again. Perhaps prior knowledge can help people study, says Shih, but we shouldn't overestimate its value.
例如念過高中的大學生知道什麼是三角函數，他不需要重新解釋，先備知識對人的學習也許有幫助，但我們也不需要把它的價值看得太高。