在留学网课中，以下是一些常用的表达用语：

网太卡了 - "Sorry, the internet is lagging. I was cut off." 或 "My internet is frozen."

没听懂- "Sorry, I didn’t quite catch that. Could you repeat what you said earlier？" 或 "I'm not sure I understand the question. Could you run that by me again？"

不想开摄像头- "Sorry, I currently am not in a good state for video connection."

对方说话声音小- "Could you speak up a bit？"

出勤相关

"출석 부를게요."（我要出勤。）

"现在开始点名。"（Let's start the roll call.）

"教授，您已经点过名了吗？"（Professor, have you taken attendance already？）

"教授，我网络不好，进来晚了，对不起。"（Professor, I'm sorry I'm late due to poor internet connection.）

突发事件

"我现在网不太好。"（I'm not having a good internet connection right now.）

"对不起，我听不太清楚。"（I'm sorry, I can't hear you very well.）

课程相关

"Take an online class."（参加网络课程。）

"Lecture"（讲课）是指老师在台上讲，学生在下面听的一种课程形式。

希望这些表达用语能帮助你在留学网课中更顺畅地进行沟通。