big talk 大话，吹牛
He is always full of big talk, but he rarely follows through on it. 他总是说大话，却很少去做并坚持到底。
talk big 说大话，吹牛
The President talks big, but he doesn’t do anything.总统老说大话，但是什么都不做。
brag about/of 吹嘘；炫耀
boast about/of 吹牛，自夸
He bragged to everyone he met about how smart his son was.他向他见到的每一人吹嘘他儿子有多聪明。
Is he boasting about his car again? 他又在吹嘘他的车了吗？
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