heart in your mouth像中文中有一句话叫作 “心悬在了嗓子眼” ，表示一个人非常紧张的一种情绪，即非常紧张；提心吊胆；害怕之极。

【例句】
When I heard that loud noise, my heart was in my mouth, and I thought something terrible had happened.
当我听到那个巨大的声音时，我感到非常紧张，我以为发生了一些可怕的事情。

When the bear came out of the woods towards us, our hearts were in our mouths.
当熊从树丛中朝我们走来时，我们的心都快跳出来了。