/ɒpt; ɑpt/
v
1 [Tt] decide to do sth; choose 决定做某事物; 选择
*He opted to go to Paris rather than London 他决定去巴黎, 不去伦敦.
2 (phr v) opt for sth decide on sth; choose sth 决定某事物; 选择某事物
*Fewer students are opting for science courses nowadays. 现在选修理科的学生少了. =>Usage at choose 用法见choose. opt out (of sth) choose not to take part (in sth) 决定不参加（某事）
*I think I'll opt out of this game. 我不想参加这场比赛.

v [I]
[Date: 1800-1900; Language: French;Origin: opter, from Latin optare 'to choose']
to choose one thing or do one thing instead of another
opt for
　We finally opted for the wood finish.
opt to do sth
　Many young people are opting to go on to college.
opt inphr v
to decide to join a group or system
opt in to
　Employees have the choice to opt in to the scheme.
opt outphr v
to avoid doing a duty
opt out of
　You can't just opt out of all responsibility for the child!
to decide not to be part of a group or system
opt out of
　Britain wants to opt out of the new European regulations.
if a school or hospital in Britain opts out, it decides to control the money that it is given by the government, instead of being controlled by local government