介: Ⅰ动词1.(在两者当中) be situated between; interpose 短语和例子介于二者之间 be situated between the two; 这座山介于两县之间。 the mountain lies between two counties.2.(存留; 放在心里) take seriously; take to heart; mind 短语和例
键: 名词1.[机械工程] (使轴与齿轮、皮带轮等连接并固定在一起的零件) key 短语和例子轴键 shaft key2.[书面语] (插门的金属棍子) bolt (of a door)3.(琴、打字机或其他机器上, 使用时按动的部分) key (of a typewriter, piano, etc.) 短语和例子按钢琴的键 press the keys of a piano;
