filler 填裝物，填塞物
filler words 填充詞
A filler word is a word or phrase that has no real meaning, it just gives the speaker a chance to pause during conversation.
填充詞沒有實際的含義，當你在聊天的間隙突然忘詞，詞窮或者需要思考的時候，用來填補這段時間的一些詞和句子。
They are also useful because they can help you to sound more like a native speaker. It just helps making your language sound more natural and relaxed.
同時它會讓你的英文聽起來更加地道，更加自然放松。

Umm…
He said "umm... I don't get it" after the teacher gave them the work.
老師布置下來作業之后，他說：額，我沒有太明白。
Q:Do you remember where he went?
你記得他去哪了嗎？
A:Umm, I think that he went to the shop.
額，他應該是去商店了。

like
A:Do you know how to get there?
你知道怎么去那里嗎？
B:Yes, I'm like, pretty sure that it's on like, this way.
知道啊，我非常確定，是從這邊過去。

actually 加強語氣
Actually, I think dogs are really cute.
我真的覺得狗狗非常地可愛！

at the end of the day
最終，到頭來，歸根結底
At the end of the day, he's a great friend.
到頭來發現他是一個很好的朋友。
At the end of the day, you've got to speak up for yourself.
到頭來，你還是得自己站出來為自己說話。

you know
He was really funny, you know?
他真的很有意思你知道嗎？