1.
I was at the peak of my elegant period.
当时我正当风流年华。
2.
get in by [through] the back door
用不正当手段获得当选
3.
Law against Unfair Competition
《反不正当竞争法》
4.
be in the right place or situation.
处在正当的场所或者正当的场合。
5.
The provinces and municipalities, prefectures, counties, districts and townships should all enjoy their own proper independence and rights and should fight for them.
正当的独立性，正当的权利，
6.
Justifiable homicide, eg killing in self-defence
正当杀人（如出於自卫）
7.
Judy is now in the bloom of youth.
朱迪现在正当青春年少。
8.
While this was doing,
正当大家全力抽水时，
9.
They lived by honest labour.
他们靠正当的劳动生活。
10.
Is it ever right to kill?
杀害生命是正当的吗?
11.
Is he justified in his behaviour?
他的行为是正当的吗？
12.
A questionable stockbroker.
不正当的股票经纪人
13.
Don't restrict her proper activities.
不要拘束她的正当活动。
14.
owe a person a grudge
(有正当的理由) 怀恨某人
15.
These are the dog days; watermelons are just in season.
现在是伏天, 西瓜正当令。
16.
scrounge around
搜寻(尤指用非正当方法)
17.
get sth.by a wangle
用不正当手段获得某物
18.
The boxer didn't box fairly.
那拳师比拳手段不正当。