“再三地”常见的英文表达有 repeatedly、again and again、time and again 或 over and over (again) 等，具体使用哪个取决于语境和表达习惯：
repeatedly：强调多次重复，语气较为正式，适用于书面语和口语。
例句：He repeatedly apologized for his mistake.（他再三为自己的错误道歉。）
again and again：强调动作或事件的重复性，语气较为口语化。
例句：She again and again reminded him to take his medicine.（她再三提醒他吃药。）
time and again：同样表示“再三地、一次又一次地”，常用于正式场合或书面语中。
例句：Time and again, he has proven his loyalty to the company.（他再三证明了自己对公司的忠诚。）
over and over (again)：与“again and again”意思相近，但更加强调动作的重复性和单调性，语气较为随意。
例句：He kept telling me the same story over and over (again).（他再三地给我讲同一个故事。）