For some simple and basic jobs, robots can completely replace people, and the cost isfor a lower cost.

For example, toll stations on expresshighways, because automatic vehicle identification technology leads to the birth of etc, so there are many fewer artificial channels, leading to the rise of the unemployment rate, because there may be the risk of finding the wrong money in the first place,. Besides, ETC can not work for 24 hours，, but people can't.

This should be broken up into 3 or 4 different sentences.

This phenomenon shows that automation and AI are gradually replacing people, so in order not to be replaced, as a freshman, I will strive to improve my competitive barrieraspects and make myself the one and only companyperson that I can not do without.

"competitive barriers" would imply an obstacle to being competitive

not sure what you mean by "one and only company that I cannot do without"

On the other hand, I would be more inclined to brainintellectual work than simple and repetitive work, such as design.