He felt himself slipping and clutched at a branch.
他感到自己滑了一下,便一把抓住一根树枝。
The ridges on the soles of my boots stopped me from slipping.
我靴子底上有隆起的纹路,使我没有滑倒。
The school's liberal, individualistic traditions were in danger of slipping into anarchy.
这所学校的自由主义和个人主义的传统有滑入无政府状态的危险。