O
on occasion 有时,不时
occur to 被想到,被想起
at odor (with) (与)不同;差异,争执
off and on 断断续续,不时的
and so on 等等
all at once 忽然,同时,一块
at once 立刻,立刻
once (and) for all 一劳永逸,限此一次
once more 再一次,又一次
one another 相互
by oneself 一个人的,单独的
come/go onto operation 开始运转,开工
put/bring into operation 使投入生产,使运转
in order 秩序井然,整齐
in order to 以便,为了
in order that 以便
out of order 发生问题,失调
put in order 整理,检修
every other 每隔一个的
other than 不同于
out of 丧失,失去;缺少,没
over and over (again) 一再,再三
owing to 因为
on ones own 一个人的,独立的
