slide down滑下
例句:The slimy snail slid slowly down the slide.
粘滑的蜗牛在滑面上慢慢地下滑。
2.He said they were moving toward the top when clouds hid them.
move toward朝某一方向
例句:To cause to move toward a goal; aim.
引导而向目标移动;瞄准
3.In nineteen ninety-nine, climbers set off to search for the remains of Mallory and Irvine.
set off出发, 动身
例句:He proposed to set off immediately.
他建议立即动身。
4.But the debate continues as to whether this famous team reached the top of Mount Everest.
as to至于, 关于
例句:I have no doubts as to your ability.
关于你的能力我毫不怀疑。