as needed

US /æz ˈniːdɪd/
UK /æz ˈniːdɪd/
"as needed" picture
1.

khi cần, tùy theo nhu cầu

when or where necessary; as required.

:
Add water as needed to the mixture.
Thêm nước khi cần vào hỗn hợp.
The nurse will change the dressing as needed.
Y tá sẽ thay băng khi cần.