6.26四级打卡四级词汇

installation [] n.安装;装置;设施 installment [] n.安装;分期付款 [英]instalment obstacle [] n.障碍,障碍物,妨害 circumstance [] n.情况,条件;境遇 instance [] n.例子,实例,事例 instant [] n.瞬间 a.立即的 instantly [] ad.立即,即刻 instantaneous [