Skateboarder often jump high into air ,go dowm steps or slide down rails on their boards.一句中“go down steps”是什么意思?
They usually free-fall for a while and then open a parachute to show for a safe landing.一句中“free-fall”是什么意思?
hand out 是什么意思?
bring up 是什么意思?
空姐怎么说?
谢谢!