我花了三周时间密集地写我的论文。

I spent three weeks working ___intensively on my thesis.

食堂在午餐时间变得非常繁忙和嘈杂，但我们都很喜欢在课堂上密集学习后和朋友聊天。

The canteen gets very busy and noisy at lunchtimes, but we all enjoy chatting to our friend after ___intensively studying in the classes.

她为马拉松进行了密集训练，每天跑步数月。

She trained ___intensively for the marathon, running every day for months.