PPT最後一頁寫“back up“是往後退的意思，back up的意思有：支援，<籃球>協防，補防，堵塞，複製，往後退。
back up
1、Radio signals received from the galaxy"s centre back up the black hole theory
從該星系中心收到的無線電訊號證實了黑洞理論。
2、Make a point of backing up your files at regular intervals
一定要定期備份檔案。
3、The Secretary General says the declaration must now be backed up by concrete and effective actions
秘書長說現在必須將宣言付諸具體有效的行動。
4、His employers, Norfolk social services, backed him up.
他的僱主——諾福克社會服務中心給予了他支援。
5、The girl denied being there, and the man backed her up.
女孩否認在場，那名男子證實了她的話。
6、Back up, Hans
倒車，漢斯。
7、Traffic into London on the M11 was backed up for several miles.
進入倫敦的車輛在11號高速公路上堵了好幾英里。
8、I backed up carefully until I felt the wall against my back
我小心翼翼地後退，直到感覺後背碰到了牆壁。
9、I get so annoyed when I lose work because I"ve forgotten to back it up.
當我因為忘了備份把完成的工作弄丟時，真是懊惱極了。
10、It is time the Government backed up its advert campaigns with tougher measures.
是政府採取更嚴厲的措施來兌現其宣傳承諾的時候了。
PPT最後一頁寫“back up“是往後退的意思，back up的意思有：支援，<籃球>協防，補防，堵塞，複製，往後退。
back up
1、Radio signals received from the galaxy"s centre back up the black hole theory
從該星系中心收到的無線電訊號證實了黑洞理論。
2、Make a point of backing up your files at regular intervals
一定要定期備份檔案。
3、The Secretary General says the declaration must now be backed up by concrete and effective actions
秘書長說現在必須將宣言付諸具體有效的行動。
4、His employers, Norfolk social services, backed him up.
他的僱主——諾福克社會服務中心給予了他支援。
5、The girl denied being there, and the man backed her up.
女孩否認在場，那名男子證實了她的話。
6、Back up, Hans
倒車，漢斯。
7、Traffic into London on the M11 was backed up for several miles.
進入倫敦的車輛在11號高速公路上堵了好幾英里。
8、I backed up carefully until I felt the wall against my back
我小心翼翼地後退，直到感覺後背碰到了牆壁。
9、I get so annoyed when I lose work because I"ve forgotten to back it up.
當我因為忘了備份把完成的工作弄丟時，真是懊惱極了。
10、It is time the Government backed up its advert campaigns with tougher measures.
是政府採取更嚴厲的措施來兌現其宣傳承諾的時候了。