1. 底层涂布/地下渗灌：subbasement /地下第二层/ | subbing /底层涂布/地下渗灌/ | subboard /子插件/
2. 地下渗灌：subbing 底层涂布 | subbing 地下渗灌 | subboard 子插件
3. 底层涂布：subbasesubbottom 底基 | subbing 底层涂布 | subbing 地下渗灌
4. 地下灌溉,地下渗灌：subbasement 底层,下层,地下室 | subbing 地下灌溉,地下渗灌 | subcatchment 支流集水区
1. Mullally became intrigued by the idea of hosting a talk show after subbing for David Letterman on his " Late Show " in 2003.
noun
1. working as a substitute for someone who is ill or on leave of absence
Synonym: substituting