In mathematics, you don't understand things. You just get used to them.
To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things that scare you to death.
The petrochemical industry must adapt to the low-carbon trend to remain competitive in the new era.