Tā de yǎnjiǎng píngdànwúqí, méiyǒu gěi guānzhòng liúxià rènhé yìnxiàng.
His speech was mediocre and left no impression on the audience.
Tips
memory
平淡 (flat/bland) + 无奇 (nothing extraordinary) — like food that has no flavor and nothing to make it stand out. 奇 (qí) means 'remarkable/strange/unusual,' so 无奇 means literally 'nothing unusual.'