For example， there are白日做梦(indulge in wishful thinking)， 白费口舌(waste one’s breath)，一穷二白(poor and blank)，白忙乎(in vain) ，白字连篇(reams of wrong characters)， 白云...
In its own right it is a worrisome reminder that America cannot safely indulgeinwishfulthinking that its equities in space will remain inviolable indefinitely, any more than it can safely rely upon unenforceable international agreements for their protection.