Sometimes, just reluctant to do something. Pretty lazy. Initially, I planned to complete experiments for a paper. Later I found there're lots of hidden traps, having to figure out all challenges one by one, which wasting lots of time. I was frustrated by some unexpected problems, then wanted to give up. But finally I have to face the problems. Therefore, what I learned is that difficulties are there, keep yourself calm and solve them without any anxiousness. That's life.