1) It's only a scratch,ie a very slight injury.
那只是一点擦伤.
2) Never say die.it's a piece of cake
别泄气，那只是小菜一碟
3) anything/nothing but
一点也不/只是;仅仅是
4) It is a male dog.
那是只公狗。
5) It is no more than an empty talk.
那只不过是空谈。
6) I suppose/expect/figure/guess/reckon it was the cat
我想那是只猫。
参考词条