I'm extremely sorry for the delay.
对此延误，我深感抱歉。
疯狂英语拿手好戏卡
感谢 - 额外成就感（一）
📚 句中词汇解析
从本句中提取的重要词汇
adv. 极端地;非常，很;去;绝;
💡 extreme极端的+ly表副词 →过分地
"The payment offered to the rank and file is extremely poor."
列兵的待遇极低.
近义：highly, hugely, immensely, inordinately, magnificently, mighty
反义：incompletely, nearly, poorly, barely, scantily, scarce
n. 延迟，拖延;耽搁;被耽搁或推迟的时间;
vt. 延期，推迟;耽搁;
vi. 延缓，延期;
💡 de(dis-=apart)+lay(bring)→延期；延缓；耽搁
"We apologize for the delay and regret any inconvenience it may have caused."
我们对此次延误以及因此有可能造成的所有不便表示道歉。
近义：latency, hinder, keep, retard, detain, postpone
反义：hurry, hustle, press, quicken, accelerate, rush
adj. 对不起的;无价值的，低等的;遗憾的;感到伤心的;
"Afterwards she was sorry for what she'd said."
后来她后悔说了那些话。
近义：heartbroken, heavyhearted, mournful, pained, regretful, repentant