这种投资风险太大，得不偿失。

Zhè zhǒng tóuzī fēngxiǎn tài dà, débùchángshī.

The risk of this investment is too high, not worth the loss.

为了省一点钱而买劣质产品，往往是得不偿失的。

Wèile shěng yìdiǎn qián ér mǎi lièzhì chǎnpǐn, wǎngwǎng shì débùchángshī de.

Buying poor‑quality products just to save a bit of money is often not worth the loss.