他放下沉重的行李箱时发出了一声哼唧。

He let out an ___ungh when he put down the heavy suitcase.

呃，这牛奶过期了！

___Ungh, this milk is expired!

他举起沉重的杠铃时发出了用力的哼声。

He let out a loud ___ungh while lifting the heavy barbell.