Research your topic and learn as much background information as you can.

研究你的选题，尽可能多的收集背景资料。

youdao

Step 2 Research your topic and learn as much background information as you can.

第二步研究你的选题，尽可能多的收集背景资料。

youdao

Step 2 Research your topic and learn as much background information as you can.

第二步研究你的选题，尽可能多的收集背景资料。

youdao