We are extremely grateful to you for the trouble you have taken on our behalf. 多蒙鼎力相助,不勝感謝。
Please use your powerful influence [great effort] to support us. 請鼎力支持。
牛津高階第八版
美國韋氏詞典
Dictionary.com
Free Dictionary
維基百科 (自由的百科全書)