It was the first time in my life------------ I had experienc

不是强调句it 是形式主语,真正的主语是后面的 That I had experienced the UK。由于不是强调句,因此不能去掉it was thatit是形式主语,完整的句子为：That I had experienced the UK was the first time in my life。译为：这是我有生以来第一次游历英国。