like a dog with two tails 高兴得什么似的；无比高兴；非常高兴

【例句】
Mary's been like a dog with two tails ever since she got her promotion.
自从玛丽升职了，她一直非常高兴。

The old lady waslike a dog with two tails when her son and his wife came home from Australia.
看到儿子及儿媳从澳大利亚回来时，老妇人欣喜若狂。