成本是选择这些建筑商的决定性因素。

Cost was the ___deciding ___factor in choosing these builders.

就个人而言，我认为教师的质量、学校声誉和设施应该是家长决定孩子在哪所学校接受教育的决定性因素。

Personally, I think the quality of teachers, school reputation and facilities should be the ___deciding ___factor for parents [for] which schools their children should be educated in.

候选人的丰富经验是最终面试阶段的决定性因素。

The candidate's extensive experience was the ___deciding ___factor during the final interview stage.