People who do not work hard and have poor self-discipline may play mobile phones in the class. If they do not listen carefully to the online class and do not practice after listening, they may be abandoned halfway, with poor results.
Do not strive for poor self-discipline of people may play in class mobile phones, net class does not really listen to, listen to do not practice, may be half-way, poor effect.
People who don't work hard and have poor self-discipline may play mobile phones in class, not listen carefully to online classes, not practice after listening, may give up halfway, and the effect is poor.<br>