The general principle is that education should be available to all children up to the age of 16.
总的原则是,16 岁以下儿童都应该能接受教育。
He called for a return to first principles (= the most important ideas ) of road safety for children.
他呼吁回归儿童道路安全的根本原则。
Similar principles apply in the case of older children (= the principles are the same as others that have been mentioned ) .
类似的原则也适用于年纪大些的儿童。
adj. principled