In many Canadian families, children contribute next to nothing to the operation of the household.

在许多加拿大人的家庭，孩子几乎从不参与家务劳动。

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Holds that household heat metering requires heating quality to be highly enhanced which in turn needs good design, high level operation management and satisfactory construction and installation.

认为实施分户热计量的前提是供暖的高质量，而保证供暖高质量需要有好的设计、高水平的运行管理和好的施工安装。

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Through a survey this paper holds that the large household pattern of agricultural operation is the ideal path for the Second Leap in the Chinese agriculture.

通过调查研究认为，农业大户经营方式是推进农业第二个飞跃的理想路径。

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"SuperWASP has a novel optical design comprising up to eight scientific cameras, each resembling in operation a household digital camera, and collectively attached to a conventional telescope mount, " said Dr Pollacco.

BBC: NEWS | UK | Northern Ireland | Scientists seek unknown planets