“随时”的反义词：定时。...

你可以随时来医院。You are welcome to visit the hospital at any time.那部电话随时可能响。Any minute now, that phone is going to ring.手边放一本便笺簿，以便有问题时随时记下。Keep a pad handy to jot down queries as they occur....

“随时”的英语可以翻译为：at any time，at all times，whenever necessary，as the occasion demands，at any moment ...

“随时”的拼音为：suí shí ...