zhǐ shì
我今天进城，只是去逛逛书店，没有别的事儿。
wǒ jīn tiān jìn chéng, zhǐ shì qù guàng guang shū diàn, méi yǒu bié de shì er.
I'm going to the city today just to browse the bookstore, nothing else.
大家问他是什么事，他只是笑，不回答。
dà jiā wèn tā shì shén me shì, tā zhǐ shì xiào, bù huí dá.
Everyone asked him what it was about, but he just smiled and didn't answer.
本来预备今天拍摄外景，只是天还没有晴，不能拍摄。
Běnlái yùbèi jīntiān pāishè wàijǐng, zhǐshì tiān hái méiyǒu qíng, bù néng pāishè.
We originally planned to shoot outdoor scenes today, but the weather hasn't cleared up yet, so we can't shoot.