聋人: deaf person, hearing-impaired person...
为止: until, (used in combination with words like in constructs of the form......)...
留学: to study abroad...
观察: to observe, to watch, to survey, to examine, observation, view, perspective...
队长: captain, team leader...
无须: need not, not obliged to, not necessarily...
股民: stock investor, share trader...
自助: self-service...
涮火锅: eat Chinese fondue...
热气: steam, heat...
