喝了几杯茶后，她变得异常健谈，分享了许多旅行故事。

After a few cups of tea, she became unusually expansive, sharing many travel stories.

expansive 来自动词 expand（扩展、扩大），加上形容词后缀 -ive 构成。expansive 本义是"扩张的、广阔的"，引申为"健谈的、开朗的"，形容人愿意敞开心扉、畅所欲言的状态。