1.spare parts2.odds and ends
1.materials and parts2.components
courseware (abbr. for 课程软件[kè chéng ruǎn jiàn])
1.recipient (of mail)2.To: (email header)
necessary and sufficient condition
1.junk mail2.spam3.unsolicited mail
(case of, incident of) murder
1.emergency2.sudden occurrence
1.restrictive condition2.constraint
1.top secret document2.classified papers
free software (i.e. software for which sharing, modification etc is permitted)
1.piece rate wage2.remuneration based on one's output3.opposite: time rate wage 计时工资[jì shí gōng zī]
1.identification document2.documentary proof
1.financial software2.accounting software
to pick up a pre-arranged item (e.g. package, document, ticket, reserved book) from a delivery point or collection location
1.blank (for a coin etc)2.breed or strain
1.to reject (visa application etc)2.(commerce) to return to sender3.item returned to sender