middle rank的用法和樣例：
例句
- At first the plan was for professional diplomats of middle rank to head the liaison offices.
原先的設想是，聯絡處主任由中級職業外交官擔任。 - Of the stage of education and schools between elementary and secondary including middle grades centering on 5 through 7.
指位於基礎和中級之間的教育階段和學校，包括五到七年級之間的中等年級。
