Disputes between parents, breakdown of a family and improper ways of education can lead to adolescents forming negative personalities and even committing an offence.

父母冲突、破碎家庭、教育方法不当以及家庭环境影响都会导致青少年形成不良个性，甚至走上犯罪的道路。

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Such improper behaviour and language from a young lady left me momentarily incapable of speech.

如此不得体的言行竟来自一位年轻女士，这让我惊愕得一时无语。

《柯林斯英汉双解大词典》

He considered all such inquiries on the part of a slave improper and impertinent.

他认为奴隶的这种询问是不恰当和无礼的。

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The Frenchman has accepted a charge of improper conduct and will serve a one-match ban after appearing to confront fourth official Martin Atkinson about the amount of time played.

BBC: Arsenal captain Cesc Fabregas faces three-week lay-off

He served a two-match touchline ban for improper conduct towards a match official at Blackpool's meeting with Ipswich in January.

BBC: FA charges Blackpool manager Ian Holloway

The FA regulatory commission which heard the case took into account Holloway's two-match touchline ban for improper conduct towards a match official at Blackpool's FA Cup third-round match against Ipswich in January.

BBC: Blackpool manager Ian Holloway given touchline ban