在英语中，"多少岁"通常被翻译为"How old are you?"，如果你想用英文表达"420岁",你可以说 "Forty-two centuries" 或者 "Four hundred and twenty years". 但是请注意，这在现实生活中是不可能的，因为人类寿命远远没有这么长。
如果你想询问某人的年龄但不想直接问"How old are you?",你可以使用一些更委婉的方式。
"I heard you're a young expert in your field, how many years have you been at it?"(我听说你在你的领域很有经验，你已经做了多少年了？)
"It seems like you've been around for a while, can you share with me how many years of experience you have?"(看起来你有一段时间的经验了，你能和我分享一下你有多少年的经验吗？)
两种方式都可以询问某人的经验或年龄，而且比直接问"How old are you?"要更加礼貌和委婉。
