语法和语义之间的相互作用是形式语言研究的核心。
The interplay between syntax and semantics is central to the study of formal languages.
教育是进步的基础。我们必须投资于培养下一代水产养殖领导者。
The world owes all its onward impulses to men ill at ease; the happy man inevitably confines himself within ancient limits.