tip in

• 将某物（尤指钱款）投入或添加到共同基金或资金池中；在体育中，也指轻轻触碰球以改变方向从而得分。

To contribute or add something, especially money, to a collective fund or pool; also used in sports to describe lightly tapping a ball into a goal or basket.

1. Insert or add carefullyB2formal

   To insert or add something, often a piece of paper or a note, into a book or document.

   插入或小心添加

   • The librarian tipped in the missing page into the old book.
   • He tipped in a handwritten note between the chapters.
   • The publisher tipped in a color plate as an illustration.

2. Contribute moneyB2informalbritish

   To add money to a collective fund or pot, often in a casual or informal setting.

   凑钱

   • Everyone tipped in a few pounds to buy a gift for the boss.
   • We all tipped in for the pizza delivery.
   • They tipped in their spare change to cover the bill.