I just need some new boxers with a comfortable waistband and a button fly.

我只需要一些带有舒适腰带和纽扣门襟的新平角内裤。

It's bloody embarrassing but I can't button my fly single-handed.

这就非常尴尬了，我一只手拉不了裤链。

He also wants a " button fly." A " button" is what you use to connect two pieces of clothing.

他还想要一个“纽扣门襟”。 “纽扣”是用来连接两件衣服的东西。

Russell, then, wants a button fly; he wants a fly in the front of his underwear that has a button to keep it closed.

那么， 拉塞尔想要一个纽扣飞翔；他想要在内裤前面有一个门襟， 并有一个纽扣来保持闭合状态。

He says, " I just need some new boxers with a comfortable waistband and a button fly." " Boxers" are a kind of underwear that a man and wears around his waist.

他说：“我只需要一些新的平角裤，有舒适的腰带和纽扣门襟。”“平角裤”是一种男士穿在腰间的内衣。