“应接不暇”常见的英文表达有 “be overwhelmed with”、“have too much to handle” 或 “be inundated with”，具体使用可根据语境调整：
1、 be overwhelmed with
（强调因数量过多而难以应对）
例句：
The visitors were overwhelmed with the beautiful scenery and couldn't take it all in.
（游客们被美景弄得应接不暇，根本看不过来。）
2、 have too much to handle
（侧重于任务或事务过多导致无法处理）
例句：
With so many projects at once, I've had too much to handle lately.
（同时处理这么多项目，我最近实在应接不暇。）
3、 be inundated with
（强调被大量信息、请求等淹没）
例句：
The customer service team was inundated with complaints after the system failure.
（系统故障后，客服团队被投诉淹没，应接不暇。）
选择依据：若描述感官或体验上的应接不暇（如美景、活动），用 be overwhelmed with 更贴切。
若强调事务或任务的超负荷，用 have too much to handle 更合适。
若指被大量信息、请求等淹没，则用 be inundated with。
例句对比：The tourists were overwhelmed with the vibrant street performances. （游客被热闹的街头表演弄得应接不暇。）
I've been inundated with emails since the announcement. （公告发布后，我的邮箱被邮件淹没，应接不暇。）