大为失望 meaning in English

feel very disappointed

I was badly disappointed by the shallow interests such dreams betrayed .
我对这些梦所显示出来的肤浅的爱好大为失望。
The news of plummeting stock prices dismayed speculators
股票价格骤然下跌的消息使股民大为失望。
He hurried to the house and was disappointed when he found that it was empty
他急忙赶到那所房子，但发现空无一人时感到大为失望。
Friends , princess marya now had none ; during this stay in moscow she had lost all faith in the two friends who had been nearest to her . mademoiselle bourienne , with whom she had never been able to be perfectly open , she now regarded with dislike , and for certain reasons kept at a distance . julie , with whom princess marya had kept up an unbroken correspondence for five years , was in moscow
公爵小姐玛丽亚没有朋友，此次抵达莫斯科，她对两个最亲近的朋友大为失望：其中一人是布里安小姐，公爵小姐原来就不能向她倾吐衷肠，现在觉得她十分可憎了，而且出于某些缘由，她开始回避她另一个朋友就是朱莉，此人住在莫斯科，公爵小姐玛丽亚和她一连通过五年信，当公爵小姐玛丽亚和她重逢时，她觉得她完全生疏了。