[suí shí]
（任何时候） at any time; at all times
If you have any questions, you can come and ask me at any time.
你有问题，随时可以来问我。
He may arrive any instant.
他随时都可能到达。
Machinery ought to be well maintained all the time.
机器应该随时注意维护。
It has been raining heavily in the last few days and mountain torrents may become a danger at any moment. We must be prepared.
连续下了几天大雨，随时有暴发山洪的危险， 要做好准备。
correct mistakes as soon as they occur
随时纠正错误
They were armed to the teeth, ready for any emergency.
他们已全副武装，随时准备应急。
They always sum up their (work) experience whenever it is necessary, so they improve rapidly.
他们总是随时总结经验， 所以工作质量提高很快。