If you are expecting something or someone, you believe that they will be delivered to you or come to you soon, often because this has been arranged earlier.
(常指因已安排而) 预期 The talks are expected to continue until tomorrow. 会谈预料将持续到明天。
expect 所表示的等待一般暗含着根据某些信息或规律而作出相应反应的意思,而 wait for 主要接续“等待”这个动作本身。