我无法相信他告诉我的事情——我震惊得说不出话来。

I couldn't believe what he was telling me - I was ___speechless.

去年，我有机会和家人再次访问干尼亚，当我了解到一切因旅游业而发生快速变化时，我惊讶得说不出话来。

Last year, I had the opportunity to visit Chania again with my family and I was ___speechless when I understood that everything had undergone rapid change due to tourism.

这个令人震惊的揭露让她完全说不出话来。

The shocking revelation rendered her completely ___speechless.