1.Love is just like doing multiply operation,the result cannot be changed to be zero if any of the number is zero.
The meaning of this sentence is that only if both of the couple put heart into the love and love each can they live a happy life.
2.I am clear-headed about the weakness of human beings ,but I believe there is true love in the world,and I am looking forward to getting a true love
3.混is an inform word of what do the people do,we Chinese mainly use it in daily spoken language to talk about if people got good achievement or did poor
HOPE MY ANSWER COULD HELP