在英语中，"一丝兴奋"可以用"a touch of excitement"来表达。这个短语的来源可能源自于人们对某些事物感到兴奋时，所产生的身体反应往往是轻微的，就像触摸一样。
下面是几个使用"a touch of excitement"的例句：
"The anticipation of opening presents on Christmas morning always brings a touch of excitement to my day." (圣诞节早上打开礼物的期待总是给我一丝兴奋。)
"I could tell from the look in his eyes that he was feepng a touch of excitement about his new job." (我从他眼神中看出他对新工作有一丝兴奋。)
"Even though I'm nervous about my presentation, there's also a touch of excitement knowing that I'll be able to share my ideas with the team." (尽管我对自己的演讲感到紧张，但我也有一丝兴奋，因为我知道我将能够与团队分享我的想法。)