To help children learn computers, it is best for parents to learn to use computers first. This can not only recommend good software to children, but also effectively prevent children from using unhealthy software. It can also set a model for children to continuously learn and be aggressive. The main meaning of this passage is? ["Parents' use of computers can directly help children learn computers.", "Children's computer learning needs the help of parents.", 'Parents learning to use computers have many benefits in helping children learn and grow.', 'Parents need to learn computers themselves to help their children learn computers.']