filler
noun uk/ˈfɪl.ər/ us/ˈfɪl.ɚ/
(FOR HOLES, CRACKS)
[ C or U ]（尤指用于填木头和墙壁的小洞及裂缝的）填充物，填料
a substance that is used to fill small holes and cracks, especially in wood and walls
(TAKING TIME OR SPACE)
[ C ]填补（杂志或报纸）空白的短文（或绘画）;填补（电台或电视台广播）间隙的谈话（或音乐）
a short text or drawings used to fill extra space in a magazine or newspaper, or talk, music, etc. used to fill extra time in a radio or television broadcast
We used the clip as a filler after one of our guests dropped out of the show. 在一位嘉宾退出节目后，我们把这个片段用来填充时间间隙。
(PHRASE)
[ C ] language specialized填充词（说话的短暂停顿时用的语气词）
a word or short phrase such as "er" or "well", used when a person pauses to think about what to say next
When she transcribed the conversation she edited out all the fillers. 当她把对话转写下来时，她删掉了所有的填充词。
See also: stocking filler