This stranger heard we were planning for my daughter's fifth birthday,
我們正在為女兒的五歲生日做準(zhǔn)備，一個(gè)陌生人聽(tīng)到我們的交談

and volunteered to drop off
自發(fā)提出要放下自己的事情

and set up a commercial bouncy house (that the kids loved)
要幫我們做一個(gè)游樂(lè)場(chǎng)里的那種充氣彈跳床（孩子們都特別喜歡的那種）

and he wouldn't take a cent in payment or let us help.
他不愿意接受任何報(bào)酬，也不用我們幫忙

He just told us to play it forward.
只說(shuō)讓我們?cè)谏站蹠?huì)開(kāi)始之前，可以提前玩一下

I was blown away by his generosity
我為他的慷慨和善良感動(dòng)不已

and it was a lot of work to set up and pack away
搭建帳篷，收拾工具花費(fèi)了他很多的時(shí)間精力

and he just said he likes knowing that kids had fun.
他說(shuō)，他只是喜歡孩子們開(kāi)心玩耍的樣子