例如，100多年前电气化被发明之后的100多年，仍有很大一部分铁路网线没有采用电气化设备。

Large parts of the network remain un-electrified, for instance, more than 100 years after electrification was invented.

youdao

例如，100多年前电气化被发明之后的100多年，仍有很大一部分铁路网线没有采用电气化设备。

Large parts of the network remain un-electrified, for instance, more than 100 years after electrification was invented.

youdao