in nature 本质上
neither …nor 既不……也不
nothing but 只有,仅仅
every now and then 有时,时时,偶尔
just now 刚才,一会儿
just that 既然,由于
on occasion 有时,不时
at odds with 与……不一致,差异,争执
off and on 断断续续,不时地
and so on 等等
all at once 突然
at once 立刻,马上
once for all 一劳永逸
once more 再一次,又一次
once another 相互
come/go into operation 开始运转
put/bring into operation 使生效,使运转
in order 秩序井然,整齐
in order to 为了
in order that 以便
out of order 发生故障,混乱
put in order 修理,检修
every other 每隔一个
other than 除了
over and over 一再,再三
owing to 由于
on one‘s own 独自的,独立的
keep pace with 跟上,与……同步
take pains 尽力,煞费苦心
play a role 起作用
take part in 参加
in particular 特别的,尤其
pass away 去世,逝世
pass off 终止,停止
pass out 失去知觉,昏倒
in the past 在过去
pay back 偿还,回报
pay off 使……得益,有报偿
pay up 全部付清
pick out 选出,挑出
pick up 拣起;搭人;获得
in place 在适当的位置
in place of 代替
in the first place 起初,首先