The hotel offers a free room upgrade, but I suspect there is a gimmick somewhere.

飯店提供免費升等客房，但我懷疑其中藏有什麼陷阱。

Before signing the supplier contract, legal checked whether the low price hid a gimmick.

簽署供應商合約前，法務部檢查了低價背後是否藏有陷阱。

Customers kept calling to ask what the gimmick was behind our zero-interest loan offer.

顧客不斷來電詢問我們零利率貸款方案背後有什麼陷阱。