The ratio of working time to standby unattended time of the tubular electric heating elements is less than 1 when the tubular electric heating elements work at interval.

所述电热管间隔工作时电热管的工作时间和非工作时间的比值小于1。

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Other real-time systems use algorithms to detect suspicious behaviour, such as a group loitering near a door where entry is barred, or to spot items of luggage that seem to have been left unattended.

其它实时系统则利用一些算法来检测可疑的行为，比如一群人在一条被封住入口的门边徘徊，抑或定位那些看起来被人落下无人看管的行李物品。

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Tooth problems left unattended can become worse over time and may lead to more severe problems.

长期放任牙齿问题不管会令它越来越严重，并可能导致诸多严重问题。

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But fishermen also follow the fish, and often snag the dolphins unintentionally in the large-mesh nets they leave unattended for days at a time.

ECONOMIST: The Mekong river

"At no point of time the cockpit was left unattended by the cockpit crew, " the airline said in a statement.

CNN: Pilot, crew suspended after cockpit incident

It is alleged that she left her son alone and unattended in the house for excessive periods of time, left him in wet and soiled nappies for excessive periods of time, caused him to be exposed to heroin and amphetamine, caused him to ingest these drugs and failed to provide medical aid and care for him.

BBC: Kimberley Hainey trial hears 'indications of abuse'