B2 used to describe what really happens as opposed to what you think will happen in a particular sit

中文解释

（用来描述真正发生的事，而不是预计会发生的事）实际上 It seemed like a good idea before we started, but in practice it was a disaster. 在我们动手之前这似乎是个好主意，但实际上却是场灾难。