caulk|caulked|caulking

窗户边缘的缝隙需要用填缝剂密封起来。

The gaps around the window frame need to be sealed with ___caulk.

工人们在安装窗户前先要用密封胶把缝隙填好。

The workers ___caulked the gaps before installing the windows.

窗户周围的缝隙需要用填缝剂密封起来。

The gaps around the windows need to be sealed with ___caulking.