主体: main part, bulk, body, subject, agent...
席位: a seat (in a theater, stadium etc), parliamentary or congressional seat...
常温: room temperature, ordinary temperatures...
反过来: conversely, in reverse order, in an opposite direction...
意想不到: unexpected, previously unimagined...
不以为然: not to accept as correct (idiom); to object, to disapprove, to take exception to...
则: (indicating sequence) then,...; (indicating cause and effect, condition) (if...,) then...; (indicating contrast)..., while...; (indicating concession) as...as it is...
私立: private (company, school etc)...
付款: to pay a sum of money, payment...
公证: notarization, notarized, acknowledgement...