These problems may appear and then disappear, sometimes resulting in long periods when there are no problems at all.

这些问题可能出现后又消失，有时很长时间没问题。

youdao

These problems may appear and then disappear, sometimes resulting in long periods when there are no problems at all.

这些问题可能出现后又消失，有时很长时间没问题。

youdao