English Dictionary

that's the thing

フレーズ

口語 慣用表現

(idiomatic, colloquial) Used to introduce the main point or issue, especially as a refutation or negation to a statement made by another speaker.

日本語の意味

それこそが肝心な点であり、相手の意見に対する反論や否定の際に、議論の核心を示す表現。 / 要は『問題の本質』や『主要なポイント』を指摘するために使われる口語的な表現。

You might think it's an easy decision, but that's the thing: you can't predict how it will affect your future.

簡単な決断だと思うかもしれないが、そこが問題で、将来にどう影響するか予測できない。

意味（1）

(idiomatic, colloquial) Used to introduce the main point or issue, especially as a refutation or negation to a statement made by another speaker.

But that's the thing, see? Like you said, you can't just go spending your money like that.