Mal called out for help when he was lost.
The article calls out the new features of the software in a sidebar.
call up: phone somebody 打电话；还有使某人回忆起..的意思I've got a busy day today. I need to call up eighty people!
Stories that call up old times.
call-up n.（服兵役的）征召令，征集December has been one of the heaviest months for call-ups of National Guard members.
call at: make a brief stop on public transport 停靠（车站）This train will call at London, Bristol and Cardiff.
The ship called at the port.
call in on: visit someone briefly 短暂拜访某人Albert called in on Kristin on his way home from work.
I thought we might call in on your mother on our way - I've got some magazines for her.
call off: cancel a plan 取消（计划等）Neil called off the party after a lack of interest from her friends.
The union threatened a strike but called it off at the last minute