Someone timid might be called shrinking violet or a wallflower, while for especially nervous types we have the curious expression: they wouldn’t say boo to a goose.

胆小的人可能被称为畏缩的紫罗兰或壁花， 而对于特别紧张的类型， 我们有一种奇怪的表达方式：他们不会对鹅说嘘。