邀请朋友到澳洲留学，你需要准备一份正式的邀请函。这份邀请函应该包含以下内容：

基本信息

你的全名

你在澳洲的地址

你朋友的姓名

你朋友的基本信息（如护照号码）

邀请目的

简要说明你邀请朋友的原因，比如一起留学、探亲等。

邀请细节

邀请的具体时间

你计划与朋友在澳洲的活动安排

关系说明

描述你与朋友之间的关系，比如同学、好友等。

财务证明

提供你的财务证明，如银行流水账单、纳税证明等，以证明你有足够的经济能力承担朋友的费用。

其他材料

根据澳洲领事馆的要求，可能还需要提供其他材料，如邀请函的复印件、被邀请人的护照复印件、机票酒店证明等。

```

To whom it may concern,

I am writing this letter to invite our/my [friend's name] to visit Australia. I am currently a student in Australia and I have been friends with [friend's name] for [number of years/months].

We plan to meet in [city/town] and spend our time [activities or sightseeing]. I believe this visit will be a great opportunity for us to catch up and explore Australia together.

Please find attached the following documents for your reference:

Copy of my passport

Copy of [friend's name]'s passport

Flight itinerary

Hotel reservation /confirm/iation

Proof of accommodation

My bank statements for the past three months

Any other required documents as per the Australian Consulate's requirements

I am confident that [friend's name] will have a wonderful time in Australia and I am looking forward to hosting them.

Thank you for considering my invitation.

Sincerely,

[Your Full Name]

[Your Address in Australia]

[Your Contact Information]

```

请注意，邀请函的格式和内容可能会根据澳洲领事馆的具体要求有所不同。建议在发送邀请函之前，仔细检查领事馆的官方指南，确保所有必要的文件都已准备齐全。