The guarantee system of construction tender is very important to ensure contractors to successfully carry out contracts.

招标投标中的担保制度对于确保合同的顺利履行具有重要意义。

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Appraising the quality characteristics of application software submitted by contractors, suppliers, or outsourcers to ensure they satisfy contractual application quality commitments.

评估由承包商、供货商，及外包商提交的应用软件的质量量度，以确保该软件达到了，合同中对软件质量的要求。

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The site manager must have a system to ensure that contractors are appropriately trained and re-trained.

现场经理必须拥有一套系统，以确保承包商接受过适当的培训与再培训。

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Conservative peer Lord Moynihan, chairman of the British Olympic Association (BOA), told the House that the BOA would "seek to ensure that all contractors... can seek recognition" when the Olympic rights pass from Locog to the BOA at the end of 2012.

BBC: Peer attacks 2012 Olympics organisers

North Ayrshire Council said it was working with contractors and engineers to ensure that the properties affected "are made safe".

BBC: Catherine Bonner

"We want to ensure that any works that are carried out are done by competent contractors under proper supervision, " he added.

BBC: St Mawes shared ownership scheme residents 'suffer'