Sent_en: 2zh Take someone who's struggling with maths and works hard to get four or five credits - and then they see their mate getting three credits for holding a conversation...
Sent_yy: 比如，某一学生努力学习数学，费了很大气力才得到4个或5个学分，然后突然发现同学们仅靠聊聊天就能得到3个学分……。