循環(huán)發(fā)展律 cyclical disease development: 循環(huán)性發(fā)病development principle: 發(fā)展原則principle of development: 發(fā)展原則development is the absolute principle: 發(fā)展是硬道理principle of cephalocaudal development: 前后發(fā)展原則下載手機詞典可隨時隨地查詞查翻譯