英语六级攻克阅读关键句245. If a mixed traffic system was in place, a
245. If a mixed traffic system was in place, automated driving could begin whenever the driver was on suitably equipped roads.
译文 如果目前已有一个混合的交通系统，那么在配备了相应设施的道路上行驶时，司机就可以启用自动驾驶。
点睛 本句是个主从复合句，主句的主干是...automated driving could begin...。其中，whenever引导时间状语从句；if引导条件状语从句。
mixed意为“混合的”。如：
He had some mixed pickles and rice for supper. 他晚饭吃了一些什锦泡菜配米饭。
automated意为“自动化的”。如：
This part of the assembly process is now fully automated. 现在，装配过程的这一部分是全自动的。
考点归纳 in place与in place of形式相近，含义却大不相同：
in place意为“在适当的位置”，与它含义相反的短语为out of place。如：
Before you leave the office, everything should be put in place. 在离开办公室之前，应把所有物品摆放好。
in place of意为“替代”，相当于take the place of或者replace。如：
Robson came on in place of Wilkins ten minutes before the end of the game. 比赛结束前10分钟，罗布森上场替换威尔金斯。
