If you are dumbstruck, you are so shocked or surprised that you cannot speak. The picture is physical: something has ‘hit’ you, and the words will not come.

If you are dumbstruck如果你dumbstruck, you are是 so shocked or surprised太震驚或太意外 that you cannot speak以致於說不出話。The picture這個畫面 is physical是實體的：something有東西 has 'hit' you打了你, and the words而話 will not come就出不來了。

It is stronger and more sudden than ordinary surprise, and a little more literary than just shocked.

It它 than ordinary surprise比一般的驚訝 is stronger and more sudden更強烈、更突然, and than just shocked也比單純的shocked a little more literary多一點文學味。

People use it for a crash, a reveal, a piece of news that stops the room. You can be happily amazed and still dumbstruck, but the word leans toward being stunned, even frozen.

People人們 use it會用它來形容 for a crash車禍, a reveal大爆料, a piece of news that stops the room或讓全場安靜下來的新聞。You你 can be happily amazed可以是開心到驚呆 and still dumbstruck同時也是dumbstruck, but但 the word leans toward being stunned這個字比較偏向愣住, even frozen甚至僵住的感覺。

Though actually dumb here is again the old ‘cannot speak’, the same idea as strike someone dumb — not ‘stupid’. Struck is the past of strike, as if the feeling hit you.

Though actually不過其實 dumb here這裡的dumb is again又是again（再一次是）the old 'cannot speak'舊的「不能說話」的意思, the same idea as strike someone dumb跟strike someone dumb是同樣的概念 — not 'stupid'不是「笨」。Struck struck是strike的past（過去式）, as if就好像 the feeling那個感覺 hit you打中了你一樣。