曾经开过 meaning in Chinese

baby shower

I taught a rigorous course in decision theory for years , and as i said earlier bridges is a book about hard choices
我曾经开过一门繁难的决策论课程达数年，我在前面说过，《廊桥遗梦》的主题是最繁难的选择。
The same flower of innocence had flourished , or was still flourishing , on their brow , that is seen on the brow of the culprit in your house .
她们的额头上曾经开过纯洁的花朵，而在您家里的那个嫌疑犯的额头上，现在也正盛开着那种同样的花。 ”
I drove the car without tc at a test in september and found that there wasn ' t much difference in the performance of the car over one lap , on new tyres
在9月测试的时候我曾经开过没有牵引力控制系统的赛车，我觉得以新的轮胎跑上一圈，在赛车的表现力上并没有太多困难。