问题 be slow off的疑问

It takes more upkeep, burns more fuel and is slow off the starting line...请问is slow off这里是be+a.+prep.的及物词组吗？the starting line是宾语。请问翻译又是怎么翻译呢？老师麻烦解答

话题 as...as could be

话题 being near the Equator

话题 be sworn in as

话题 be rich or poor

话题 be supposed to do

话题 be surprised by/at

话题 be going to go

话题 find sb to be

话题 of what can be

话题 be able to do

话题 be of good quality

话题 be less/more about

话题 are to be found

话题 be of doing sth