They ask me for a deposit, and I only have to pay the rest when I get the goods.

他們讓我先付個定金，我拿到貨以后再付其余的錢。

Wait a minute. Something doesn't quite add up here.

等一下，這里面有蹊蹺。

They're giving me this iPad for free, and I only have to give them this old plastic ring.

他們把這個iPad送給我，我只用給他們這個破破的塑料戒指。

No way. Something doesn't quite add up there.

哪有這么好的事兒，一定有溪曉。

重點講解

Something feels wrong.

Something doesn't quite add up here.

not add up字面的意思是“加不起來，湊不到一塊兒”就像一幅拼圖，如果合不到一起就說明有問題,引申為“事有蹊蹺，不對勁”，如：Something doesn't quite add up here.也可以搖搖頭說：This doesn't fed rig^it.(這似乎有點不對勁。