小汽车大量进入居住区已经成为趋势。
The rapid increase in the number of automobiles will inevitably affect life in residential districts.
现在定制已经成为趋势，而且未来也一定是这样。
It seems that customized are the trend and the way of the future.
所以，建立远程故障诊断专家系统已经成为趋势所在。
Therefore, the establishment of Remote Fault Diagnosis Expert System has become a trend.
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