Generally a brief note or a phone call will suffice.

通常写个便条或打个电话就足够了。

《牛津词典》

At the end of every day, jot down a brief note on how peppy or tired you felt.

每天结束时，随便写上一小段，记下你感到多么有活力或多么疲劳。

《柯林斯英汉双解大词典》

She made a brief note on the telephone pad.

她在电话通讯簿上记下简短的话。

youdao

So imagine my surprise when, within days, I got a brief note back, along with a recipe for something exciting called Moules Normandes.

NPR: Mussels Made Easy

"Apple is very lucky to have Steve as its leader and CEO, and he deserves our complete and unwavering support during his recuperation, " Apple's board of directors said in a brief note Monday.

FORBES: Magazine Article

And the story goes that after these heroic citizens and soldiers beat the odds and turned back the invaders, General Zaragoza found time to sit down and write a brief note to the war minister.

WHITEHOUSE: Remarks By The President At Cinco De Mayo Reception