TRRL is now ready to start some experiments in London and says that a full-scale system could be installed by 1990.
TRRL已经准备在伦敦做一些实验，自动导航系统就在1990左右全面实行。
TRRL is now ready to start some experiments in London and says that a full-scale system could be installed by 1990.
TRRL已经准备在伦敦做一些实验，自动导航系统就在1990左右全面实行。
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