'I owe you for a trunk call to London'.

“我欠你一个去伦敦的长途电话”。

Light, flat patches also appear on the trunk called ash leaf spots and a distinctive dark, raised patch on the forehead is a common feature.

躯干上会出现色浅扁平的斑块，叫做叶状白斑；前额上出现明显的、隆起的黑色斑块也是常见特征。