反对(做)某事
object to (doing) sth be opposed to (doing) sth
感激某人(做)某事
be obliged to sb for (doing) sth
被迫做某事
be obliged to do sth
强迫某人做某事
oblige sb to do sth
遵守规则
observe a rule
庆祝某人的生日
observe a person’s birthday
观察某人做某事
observe sb doing sth
有时
on occasion
在…的场合下
on the occasion of
忙于做某事
occupy oneself in doing
be occupied in doing
某事发生在某人身上
sth occur to sb
某人突然想到…
It occurred to sb that …
干杂活,打工
do odd job
因某事对某人生气
be offended with sb at sth
为某人提供某物
offer sb sth
offer sth to sb
主动提议做某事
offer to do
就职
take office
突然
all at once
每天(每周)一次
once a day (week)
再一次
once again
once more
偶尔
once in a while
从前
once upon a time
对公众开放
be open to the public
在户外
in the open air