Repeated customs delays frustrated our plan to launch the product in March.

海關一再延誤，打亂了我們三月推出產品的計畫。

Rising interest rates may frustrate the company's efforts to expand overseas this year.

利率上升可能會阻礙公司今年拓展海外市場的努力。

A tight labor market has frustrated our attempts to fill the senior engineer position.

勞動市場人力吃緊，使我們招募資深工程師的努力一再受挫。