1、四年級[sì nián jí]的英語是fourth grade (elementary school); senior (high school, college)。短語:senior maths class 高中數學課堂;senior English class teaching 農村高中英語課堂教學;senior politics class 高中思想政治課。
2、雙語例句：他們還對這個學區的高等數學專案提供鼎力支援，這一專案曾經叢四年級開始，但現在將從六年級開始。They have been huge supporters of the districts advanced mathematics program, which once began in the fourth grade but will now start in the sixth.
