boast的解释
n. 吹牛
v. 吹牛,自夸
boast的例句
Don't believe him; he is just boasting.
别相信他，他只是在吹嘘罢了。

It is one of their proudest boasts that they have halved the death rate from typhoid.
他们使伤寒病人的死亡率降低了一半，这是他们最感骄傲的事之一。