I only said it in fun. 我说这话只是开玩笑的。

She spoke in grief rather than in anger. 与其说她讲得很气愤，不如说她讲得很伤心。

还有一些短语也用in，如：

in jest 诙谐地，in joke 开玩笑地，in spite 恶意地， in fairness 公正地，in revenge 报复， in mercy 宽大，in sorrow 伤心地等。

His mind was in great confusion. 他脑子里很乱。

Today everybody is in high spirits and no one is in low ebb. 今天大家都兴高采烈，没有一个情绪低落的。

She and her classmates are in flower ages. 她和她的同学都正值妙龄。

The compaign was in full swing. 运动正值高潮中。

方面：

例：we accepted the item in principle. 我们在原则上接受了这个条款。

They are never backward in giving their views. 他们从来不怕发表自己的意见。

The backward area has achieved self-sufficient in grain. 这个落后的地区在粮食方面已能自给。

A good teacher must be an example in study. 一个好的教师必须是学习的模范。

方式：

例：All the speeches were taken down in shorthand. 所有报告都用速记记录下来了。

The Party has always educated us in the spirit of patriotism and internationalism. 党一贯以爱国主义和国际主义精神教育我们。