英[\'frɒstɪlɪ]
美[\'frɒstɪlɪ]
The Prime Minister smiled again, this time a trifle frostily.
首相又笑了笑，这回有点儿冷冰冰的。
柯林斯例句
He smiled frostily and deliberately turned away.
他冷冷地笑了笑便故意转身走了.
互联网
"`Come in if you have to,' he said frostily"