名詞 write down:

1. (accounting) reduction in the book value of an asset
   同義詞：write-off, write-down

動詞 write down:

1. put down in writing; of texts, musical compositions, etc.
   同義詞：set down, get down, put down
2. reduce the estimated value of something
   同義詞：write off

1. Write down the address before you forget it.
   把地址寫下來，省得忘了。
2. I want to write down what you just said.
   我想把你方才所說的寫下來。
3. Please write down your initials on each page of the paper.
   請在每頁考卷上寫下名字的首字母。
4. You don't have to write down every little incident in your life.
   你不必把生活中每一件事都記錄下來。